Diamond Scams

By: D.Rhadika

When it comes to diamonds, there are numerous scams to avoid. Most scams are
minor, but there are some major ones that come up from time to time concerning the buying and selling of diamonds. Scams occur simply because most people who buy diamonds – for whatever reasons – don’t know that much about diamonds. Therefore, they are easily fooled.

A common scam that most jewelry stores participate in is the Carat Total Weight scam. The tag on the piece of jewelry, usually a ring, only states the total carat weight of all diamonds in the piece, instead of listing the total weights separately for each diamond. This leads consumers to believe that the main diamond in the piece is actually bigger than it is. Ask what the total carat weight of the center stone is. Also beware of fractions. Jewelry stores are allowed to round off diamond
weights. This means that if the jeweler tells you that it is a ¾ carat diamond, it is
probably between ½ and ¾ carat – but closer to ¾.

Jewelry stores often run ‘fluorescence’ scams to varying degrees. Referring to a
diamond as a blue-white diamond is such a scam. A blue-white diamond sounds very unique and special, but in fact, this type of diamond is of lesser quality – even though the jeweler will try to make you think you are getting something special. Jewelry stores also like to show their diamonds in bright lights. Lights make diamonds shine. Ask to see the diamond in a different, darker type of lighting as well.

Some truly unscrupulous jewelers target those who want appraisals on diamonds
that were given to them as gifts or that were purchased elsewhere. They will try to tell you that the diamond is worthless, or worth less than it actually is worth – and offer to take it off your hands or trade it for a much better diamond, along with the cash to make up the difference. This is called low balling. Get a second, third, and even a forth opinion before taking any action.

Another common dirty trick is to switch the diamond you have chosen and paid for with one of lesser quality and value when you leave it to be set in a piece of jewelry, or leave a diamond ring to be sized. The only way to avoid this is to do business with one trustworthy jeweler. Avoid jewelers that you have not done business with in the past.

There are many more scams that jewelry stores commonly pull on unsuspecting
consumers. Just use your best judgment, and purchase your diamonds with the
utmost care and consideration.

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Posted by rhadika, Monday, November 17, 2008 4:40 PM | 1 comments |

Diamond Grading Reports

By: D.Rhadika

You’ve been told that having a certificate or a diamond grading report is important, and as a responsible consumer, you get one – unfortunately, you probably won’t understand a word of what is on that diamond grading report, unless you are a jeweler.

On the color grading scale, D, E, and F mean that the diamond has no color. G, H,
and I means that it has very little color. J, K, and L means that the diamond has a slight yellow color. P, Q, R, S, T, U, V, W, and X means that the diamond is a darker shade of yellow. Z means that the diamond has a fancy color – other than white or yellow. On the color grading scale, D is the most valuable, and X is the least valuable – however diamonds that get a Z rating are the rarest and most expensive diamonds in the world.

There are many aspects to a grading report. Figuring it all out can be very confusing. You should talk to a jeweler you trust, and have them explain everything on the diamond grading report to you.

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Posted by rhadika, 4:39 PM | 0 comments |

Diamond Certificates

By: D.Rhadika

A diamond certificate is also known as a Diamond Grading Report. This report comes from the Gemological Institute of America (GIA), and you should require this report when you are purchasing a diamond.

With a diamond certificate, you can verify the color, cut, carat, weight, and clarity of the diamond. You don’t have to worry about a diamond dealer telling you anything less than the truth, because the certificate comes from the GIA – not the dealer. You may be required to pay for the certificate, but the cost is usually low, and in many cases, it will help you negotiate a better price on the diamond – or keep you from purchasing a lower quality diamond altogether.

If you buy a high quality diamond, and then later decide to sell the diamond, you will
need to have the certificate, or you will have a hard time selling it to someone else.Furthermore, you can use the Diamond Grading Report to look up the wholesale value of the diamond in question. Use the guide that is used by the diamond cutting industry.

With the Certificate, or Diamond Grading Report, there won’t be any doubts when you are trying to purchase a diamond. You can easily find out what the diamond is worth. This will prevent you from overpaying, and it can prevent a seller from under-charging as well.

A copy of the Diamond Grading Report should be given to your insurance company as well, when you insure the diamond. This provides absolute, unquestionable proof of the value of the diamond should it be stolen in the future. Insurance companies cannot argue with the report.

Avoid diamond dealers who seem reluctantto provide a certificate! Also avoid sellers who tell you that a certificate diamond will cost you more – the only additional cost should be the cost of the certificate, which is low. If the dealer doesn’t want to provide a certificate, then you don’t want to do business with that dealer.

Don’t accept certificates from Gemological Laboratories other than GIA. There are many fly-by-night Gemological labs these days, but in the end, GIA has been established as the most respectable and trustworthy – not to mention oldest – of the lot. So avoid dealers who don’t want to use GIA for certification purposes as well.

Don’t buy an expensive diamond without paying the extra cost of the certificate. If a
dealer tries to convince you to make the purchase without the certificate, or if they
want to use a company other than GIA, you can be sure that the dealer has probably greatly inflated the price of the diamond – they have something that they are hiding from you.

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Posted by rhadika, 4:37 PM | 0 comments |

Diamond Brands and What They Mean

By: D.Rhadika

Diamonds are one of the few products that simply cannot be ‘branded.’ Even though there are different cuts, different grades, and different values placed on each and every diamond in existence, no diamond is any specific brand – just as gold is not a specific brand.

Branding is actually based on who owns the diamond. For instance, if DeBeers owns the diamond, it is a DeBeers Diamond – but it is still just a diamond. If the diamond was cut by a specific well known cutter, then it might be branded in that way as well – but it usually isn’t. It is still branded based on who owns it at the time. So basically, when it comes down to it – diamond brands mean absolutely
nothing at all.

Do not allow a jeweler to try to talk you into paying an exorbitant price on a diamond because it is a specific brand. This is a bit of trickery used by unscrupulous jewelers when they know that they are dealing with people who don’t know much about diamonds. Remember that diamonds are not actually branded – unless mother nature has her own brand!

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Posted by rhadika, 4:31 PM | 0 comments |

Colored Diamonds

By: D.Rhadika

Fancy colored diamonds are all the rage these days. Gemologists have developed new ways to create versions that are affordable for the average person - by treating less desirable diamonds. These less desirable diamonds are treated with irradiation followed by intense heat. This turns brown and yellowish diamonds into beautifully colored diamonds that you can afford. This produces stunning greens, blues, yellows, reds, purples and other colors. These colors are considered permanent, but there is a possibility they could change during repairs if a high heat is used.

Treatments like irradiation make it possible for more people to own these vividly colored diamonds. Most natural colored diamonds are rare and also extremely expensive. When shopping for colored diamonds you need to assume that any affordable fancy color diamond has been treated. Ask about the stones origin and request to view a lab certificate to verify authenticity.

Synthetic colored diamonds are another option if owning a colored diamond is
something you desire but cannot quite afford. They are real diamonds, but they are created in a lab.

Natural fancy color diamonds get their coloring from different trace elements present in the stones, such as nitrogen, which produces a yellow diamond. Diamonds can be colored by exposure to radiation during its creation. An example of a diamond affected by radiation is a Green diamond.

Another way that a natural colored diamond gets color is by its inclusions. Regarded as flaws and undesirable in a colorless diamond, inclusions give unique tones and brilliant flashes of color in a fancy color diamond. Remember that Natural fancy colored diamonds are very expensive, any colored diamond labeled to be sold as natural should
be accompanied by a certificate from a
respected grading lab.

A "fancy" diamond is a natural diamond that has color. These colors vary from red, green, purple, violet, orange, blue and pink – and most shades between. Fancy color shades vary from faint to intense.

The most famous diamonds in the world are Color diamonds. The Tiffany Diamond, which is yellow and the Hope Diamond which is blue are colored diamonds. Color diamonds have an amazing financial track record. The value has never decreased on wholesale level in more than 30 years. Blue and pink diamonds have doubled every 5 years of a strong economy. In the 1970’s you could have bought a very high quality blue diamond for about 50K and today the
very same stone would be worth between 2 and 3 million.

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Posted by rhadika, 4:27 PM | 0 comments |

Choosing The Cut of A Diamond

By: D.Rhadika

There are many different cuts of diamonds to choose from. The cut essentially refers to the shape that the diamond is cut into – unless you are in the diamond or jewelry
business, but this shape has a great impact on the much the diamond sparkles.

The most popular cuts are heart, marquise, oval, pear, princess, round, trillion, and
emerald cuts. The shape has an impact on how much the diamond sparkles, but the
actual cutting itself – when the diamond cutter actually cuts the diamond into a
particular shape – also matters a great deal. If the diamond is poorly cut, it will lose its sparkle.

However, in the diamond industry, the cut of a diamond doesn’t refer to its shape at all. Instead, this is a reference to the stone’s depth, width, brilliance, durability, clarity, and other aspects of the diamond. Common cutting problems include a missing or off center culet, misalignment, a diamond that is too thick or too thin, cracks, or broken culets.

When shopping for a diamond, you should of course choose the shape that you like the best, but then look at several different diamonds of that shape to find the one with
the best cut – the one that sparkles the most, in all types of lighting.

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Posted by rhadika, Sunday, November 16, 2008 4:33 PM | 0 comments |

Buying Diamonds Online

By: D.Rhadika

With all of the potential for scams concerning diamonds, buying diamonds online almost seems unthinkable! However, you actually can purchase diamonds online, without any problems – as long as you are careful.

First, think about your reasons for wanting to purchase the diamond online, as opposed to making a purchase from a local jewelry store. The most common reason is price. Due to low overhead costs, online jewelers and wholesalers are able to offer lower prices. However, you must be careful – sometimes a price that is too low is a sure indication of a scam.

One of the best things about purchasing online is the unlimited selection. When
shopping offline, you are limited to the selection in the stores in your general area. Online, there are no limits. But again, you must use a great deal of care and
consideration before handing your money over to someone that you cannot see and
have never met!

Before shopping, learn as much as you can about diamonds – especially cut, color, clarity and carat weights. When you are knowledgeable about diamonds, it will be
harder for a con artist to rip you off. Once you know more about diamonds, you will be ready to start shopping.

Take your time. Don’t purchase the first diamond that you see that interests you.
Instead, look for similar diamonds for sale. Do some comparison shopping to find the
lowest prices. Once you have found thelowest price, start doing your investigation.
You know about diamonds, you’ve found a diamond that you love, and you’ve found the
lowest price – but you are still quite a ways away from actually purchasing that diamond!

Ask about the seller’s credentials, such as professional jewelry associations that they belong to. View and print the seller’s return, refund, and upgrade policies. Also inquire about additional services, such as settings and mountings, sizing, and free shipping. Do a search for customer reviews on this particular company around the Internet. Alsocheck with the BBB Online to see if there have been any complaints.

Ask for a diamond grading report from an independent laboratory such as GIA, HRD,
EGL or AGS. You should see this before making a purchase. Finally, use a reputable
escrow service for high dollar diamonds – preferably one that will have the diamondappraised while it is in their possession. The seller sends the diamond to the escrow service, and you send the money to pay for the diamond to the escrow service. The escrow service has the diamond appraised, sends the diamond to you, and sends the
money to the seller. This is the surest way to protect yourself…again, make sure that you use a reputable escrow service!

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Posted by rhadika, 4:31 PM | 0 comments |

Bonded Diamonds

By: D. Rhadika

Before you start shopping for diamonds, consider dealing with a bonded jeweler.
Bonded jewelers sell bonded diamonds, and there are very few bonded jewelers in the world. In fact, out of all of the jeweler’s in the world, only about 5% of them are bonded. Buying a bonded diamond will cost more than buying a non-bonded
diamond, but when you look at what you get with the bonded option, you will see that it is well worth the extra expense.

First, bonded diamonds have a buy back policy for the life of the diamond. No matter
how long you have had the diamond, you can take it back to the bonded jeweler and sell it back to him or her, for a 100% refund. If a jeweler does not offer a 100% buy back guarantee, for the life of the diamond, thenyou should take a closer look at the diamond to see what is wrong with it.

Bonded diamonds also have a breakage policy. If the stone breaks or chips, the bonded jeweler will replace it with a new one – one time. No jeweler would ever offer such a policy on any stone that was not 100% natural, so just the offer of such a policy
should give you piece of mind concerning the quality of the diamond. Bonded diamonds are natural and untreated.

Bonded diamonds increase in value, with a fixed appreciation rate that is designed to
keep up with inflation. This means that a diamond that is worth a certain amount of
money today will be worth more in the future, as the price of diamonds continues to rise. This generally does not apply to buy backs, however. It typically applies to trade-ins.

Alternately, by purchasing a bonded diamond, you are protected against the possibility of a market crash. If a market crash occurs, the value of diamonds will
drop. However, the bonded jeweler guarantees to refund you the difference between what the diamond is now worth and what you paid for it before the market crash.

It may be difficult to find a bonded jeweler in your area, but if you can, this is who you want to deal with, as opposed to dealing with an un-bondedjeweler.Specifically tell the jeweler that you are only interested in bonded diamonds. You can find a bonded jeweler in your area by using various online resources, or by calling the local jewelry stores.

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Posted by rhadika, 4:30 PM | 0 comments |

Are Diamonds Really Rare?

By: D.Rhadika

When you walk into a jewelry store and see all the diamonds in all of the various settings that are for sale, it is difficult to realize that diamonds are indeed rare. Most people don’t even stop to consider how that diamond came to be sitting in that jeweler’s case! There is quite a bit of work that is donebefore a diamond is ready to sell to the general public!
For every one million diamonds that are mined, only one will be found that is a quality one caret diamond. In order to find a two caret diamond, about five million diamonds must be mined. More than two hundred tons of ore must be mined to find one small diamond, and even then, more than 80% of the diamonds that are mined are only
good for industrial use, such as diamond drill bits.

So, the next time you visit your local jewelry store, ask to see the one carat diamonds. You should look at this diamond with new appreciation – knowing that it truly is one in a million!

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Posted by rhadika, 4:28 PM | 0 comments |

All About the Clarity of Diamonds

By: D. Rhadika

Clarity is an important aspect of a diamond, and it is important to know how to grade the clarity of a diamond before you buy one. It is actually quite easy to learn how to grade the clarity of a diamond. There are basically two things that you must understand: Diamonds with visual inclusions and blemishes, and those that are ‘eye clean’ meaning that there are no inclusions or blemishes that can be seen with the naked eye. From there, the clarity of a diamond is further broken down
into subcategories.

Many people mistakenly think that diamond clarity refers to how clear it is. This isn’t so. Clarity actually refers to the internal and external imperfections of the diamond. The best diamonds, of course get a grade of FL or IF – Flawless or Internally Flawless – meaning that it is perfect. A grade of I-1, I-2 or I-3 means that the diamond is imperfect, with a grade of I-3 being the worst.

Other grades are VVS1 and VVS2, which means that the diamond is very, very slightly imperfect; VS1 and VS2, meaning the diamond is very slightly imperfect; SI-1 and SI-2, which means that the diamond is slightly imperfect.

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Posted by rhadika, 4:27 PM | 0 comments |

About Diamond Weights

By: D.Rhadika

Diamonds are measured in Carat Weight. One carat weighs 200 milligrams. If a diamond is referred to as four grains, this also means that it is a one carat diamond. he word Carat comes from the word carob. A carob is a bean that grows on a tree in the
Mediterranean. In times past, if a diamond weighed the same as a carob bean, it was
one carob, or one carat.

However, in the far east, where Carob trees do not grow, rice was used to measure the
weight of a diamond. If a diamond weighed as much as four grains of rice, it was four
grains – or one carat as we know it to be now. The majority of diamond purchases
are for diamonds that are 1/3 of a carat.

Beware when shopping for diamonds that are already set or mounted. If more than one
diamond is used in the piece, the tag on the jewelry will give the CTW or Carat Total Weight – it does not tell you the carat weight of each stone in the piece. You need to ask the jeweler for the total carat weight of the largest diamond in the piece to truly understand what you are buying.

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Posted by rhadika, 4:25 PM | 0 comments |

Couples diamond

By: D.Rhadika

The smart groom-to-be does his research before buying his fiancée a diamond ring! There are more styles and cuts to choose from than ever before. It’s not enough to be educated about the four Cs of diamonds – cut, color, clarity and carats. Now there are all types of diamond cuts and settings to choose from.

The most popular style is still the round brilliant. It’s one of the earliest cuts ever developed and now relies on precise mathematical equations to create a stone with fire and brilliance that the earliest gem cutters could only have dreamed of.

But many brides want something completely unique. There are many traditional cuts to choose from. A pear-shaped is just that – wider at one end than the other. Or she can choose an oval, emerald or heart-shaped diamond. There are other cuts with unique faceting, such as the square princess-cut diamond.

Some cuts are patented, like the elongated Ashoka diamond or the Asprey & Garrard Eternal cut diamond. Other branded and patented cuts include:

Elara – a square-cut diamond with rounded corners
Asscher – a square diamond with rounded facets that gives an unusual complexity to the diamond
Couples diamond – this diamond is faceted to reveal either a circle of hearts or arrows inside. It’s a truly unusual diamond that requires precise cutting for the image to appear properly.

The price of a diamond increases exponentially with its carat weight. A one-carat diamond costs much more than 10 10-point diamonds and a two-carat diamond costs more than twice as much as a one-carat diamond (given equal quality in other areas).

One way to enhance a ring is with embellishments such as baguettes or trillions. A baguette is a small emerald-shaped diamond that can be placed on either side of the main stones and a trillion is a triangle-shaped diamond that also is a good enhancement to the center stone.

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Posted by rhadika, Thursday, November 13, 2008 4:22 PM | 0 comments |

Diamond cutting styles

By: D.Rhadika

Our love of diamonds and admiration of their fire and brilliance has given rise to many different cuts of diamonds. While we still see some of the earliest styles of diamond cuts – such as the round and emerald-cut, there are many more cuts today, some of them patented by their designers and costing hundreds of thousands of dollars.

The most popular cut for a diamond ring today is still the round, brilliant cut. It was developed in the 17th century in Venice. It is still preferred when the raw crystal is in an octahedron formation. Even though as much as 50% of the stone is cut away in the process, often two stones can be carved from an octahedron. More unusually-shaped stones are used for fancy cuts, such as a marquise, pear or heart-shaped diamond. The earliest brilliants had 17 facets on the top of the stone and were called double-cut. This was soon improved with stones cut with 33 facets and were called triple-cut brilliants.

In the 19th century, with the development of better gem-cutting tools, more innovations in diamond cutting styles were developed. In 1919, Marcel Tolkowsky combined the art of cutting with the science of light and refraction and published his book, Diamond Design. These relatively recent geometric calculations were the forerunner of much of diamond cutting work today and led to other, more precise mathematical models engineered to enhance the fire and brilliance of diamonds.

There are now cuts such as the princess cut, trillions, ovals, pear and heart-shaped. Some innovative cutters have even fashioned star or butterfly-shaped diamonds! One patented cut, the Ashoka diamond, is an oblong cut with rounded, brilliant ends, and requires a stone 3 carats or larger. It’s an exceptionally beautiful (and pricey!) diamond shape. Tiffany has also patented a cut of diamond called the Lucida cut. It’s the lucky bride whose fiancé gives her one of these highly coveted stones!

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Posted by rhadika, 4:20 PM | 0 comments |

Gem cutting

By: D.Rhadika

How does a lump of mineral or crystal become a dazzling diamond, ruby or sapphire? It’s an amazing process called gem cutting or lapidary and makes all the difference in the final value of the stone. It was developed first in Venice in the early 1300’s and was seen in Paris and Bruges in the mid-1400s.Good cutting is a precise art that catches the light just so, and captures the beauty of the gem. Poor cutting destroys it.

Most gems start out actually being sawed with a special lapidary saw into a rough shape, such as square, round, pear or marquise. It’s then ground with a diamond-infused wheel to further refine the shape. The gem cutter uses a series of finer and finer abrasives to get closer to the clear heart of the gem. Cabochon gems are polished to a smooth overall surface, sometimes held by hand, but more often fixed or “dopped” with wax or adhesive to a dowel to hold it while the lapidarist polishes the stone.

Transparent stones are most often faceted, a process where flat planes of the stone are cut and polished over the surface in a precise, symmetrical pattern. It’s critical that the planes match up perfectly, or the beauty of how the light is captured by the facets will be lost.
If a stone is cut to flat or not polished, the brilliance of the gem will also be lost. When a stone is properly faceted, it captures the light so it bounces around inside the stone, giving it the sparkle we love and that helps determine the value of the gem. If the stone is cut too flat, or the facets don’t meet precisely, the light doesn’t bounce off the angles in the facets to maximum effect.

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Posted by rhadika, 4:18 PM | 0 comments |

Colors of gems

By: D.Rhadika

Gems come in every color of the spectrum. While sapphires, rubies and emeralds are what come to mind first when one thinks of a colored gem, there are so many other beautiful colored gemstones to consider. Even among gems normally associated with one color, there are gradations and variations to them. A sapphire, for example, comes in many different hues of blue, depending on where it’s from. But sapphires can also come in pink, yellow and green.

The most highly prized colored gems are in the very deepest, richest hues of the color. While sapphires can range from pale blue to near-black, the most valuable are a rich, deep blue. The same holds true for rubies. While they too can range in color from pale to very dark and murky, the most highly-valued color is what’s called pigeon’s blood, a deep blood-red ruby that is mined in what was once known as Burma.

The most expensive emeralds are a deep green, although emeralds themselves come in a broad spectrum of hues, from yellow-green to blue-green. All colored gems, and clear gems, depend on expert cutting and polishing to showcase the colors in all their subtleties and brilliance.

Generally the deeper and richer the color, the more valuable the stone. The best amethysts will be a dark, royal purple. A lighter-colored amethyst simply isn’t as valuable.

But many people prefer these lighter or darker gradations in color. And, they tend to be more affordable. A slightly lighter-colored amethyst is much easier to obtain than the “ideal” color, but is still a beautiful gemstone.

Oddly enough, diamonds are rated by how colorless they are. The less color, the higher the grade of diamond. Unless of course it’s a defined color such as a pink diamond or a canary diamond. These are almost as highly prized as a near-colorless diamond.

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Posted by rhadika, 4:17 PM | 0 comments |

Other Diamonds

By: D.Rhadika

The appeal of diamonds and other precious gems has endured for eons. They confer on the wearer a feeling of beauty, value, status. We are drawn to them and we all have our personal favorites. Sometimes it’s our birthstone. For others, a particular stone reflects a favorite color. There is almost a magical feeling when you are near them, the energy they create it is palpable.

While the clear diamond has been the traditional stone of choice for engagement and wedding bands, other stones are actually more valued and prized because of their rarity. The sapphire has often been the stone of choice for royal betrothal rings. When Princess Diana selected her 18-carat sapphire-and-diamond engagement ring, she selected one of the rarest stones on the earth. When Jennifer Lopez was engaged to Ben Affleck, she sported a 6-carat pink diamond ring. Camilla Parker-Bowles chose an emerald ring when she became engaged to Prince Charles.

We’ve become even more fascinated with beautiful jewelry because of the popularity of celebrity venues like award shows. Often this jewelry is on loan to the celebrity. At one time, we could only look at pieces like that a sigh wistfully. But with the creation of cubic zirconia, a nearly identical chemical twin to the diamond, we can satisfy some of our more extravagant whims without breaking the bank! And there’s no reason to let on that maybe that fabulous new ring you’re wearing isn’t really diamonds. Let everyone think your boyfriend or husband got a financial windfall and spent it all on you!

But when you can afford the real thing, there’s really nothing like it, is there? Is there a prized piece in your collection? Do you wear it often, or only on special occasions? If you don’t wear your jewelry often, give yourself a lift and start bringing that special ring out on regular occasions. It can certainly brighten up a dreary Monday when you’re wearing something special!

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Posted by rhadika, 4:15 PM | 0 comments |

Why are most minerals not popular as gems?

By: D.Rhadika

There are millions of minerals that exist on the earth, but few of them are prized as gems and used for adornment. Many of them aren’t in colors that are usually highly prized for jewelry. Or they’re not able to be cut and polished to be made wearable as jewelry.

Often it’s a matter of changing taste and times. In Imperial Russia and in the Victorian era, the mineral malachite and other opaque minerals were highly valued as gemstones jewelry. It is often a by-product of copper mining, and is distinguished by a brilliant green color, with dark concentric circles of color swirling through it. It’s not as highly valued because it’s easily available and not as expensive as an emerald or ruby. But there is an entire room devoted to malachite in the Russian museum, the Hermitage, as testament to its desirability among the most privileged class of people.

There have been discoveries that indicate that malachite was mined in Egypt as early as 4,000 B.C. It’s a soft gem, and easily carved and shaped. It polishes to a beautiful, rich sheen. But still is not highly prized in the U.S. as a gemstone.

Very often some minerals simply shouldn’t be used as gemstones, but because of their beauty, people wear them as such anyway. A moonstone is one such gem. It’s relatively soft, with a rating of 6 on Moh’s scale of mineral hardness, compared to a diamond’s hardness rating of 10. It’s a type of mineral called orthoclase, but when it exhibits a translucent, milky quality, it’s then called moonstone.

Other minerals exist, but are simply not prized for gemstones. Among the more common minerals, quartz stands out as one that can be used for jewelry, as well as decorative items.

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Posted by rhadika, 4:14 PM | 0 comments |

Garnet

By: D.Rhadika
Garnets have been known and used in jewelry for thousands of years. Legend says that Noah used a garnet lantern to safely steer his Ark through the darkness of the night and the great flood. Garnets are found in jewelry from ancient Egyptian, Greek and Roman eras. Many courageous discoverers and travelers wore garnets for protection, as they were considered popular talismans and protective stones, because it was believed in those days that garnets illuminate the night and prevent their wearer from any sort of evil. Today science explained to us that the proverbial luminosity of garnet is caused by its high refraction of light.
Although the color red is the one which occurs most frequently, there are also garnets showing different shades of green, pale to bright yellow, fiery orange and fine earth- and umbra-shades. Only blue is a color which is not available in garnet. Garnets are gemstones which are in high demand and are often worked into pieces of jewellery - especially since today not only the traditional gemstone colors red, blue and green are cherished by the consumer, but the intermediate shades and hues are also very popular. Garnets are unusual because their tone can change depending on whether they’re seen in natural or artificial light.
Some of the alternately-colored garnets are very famous. Spessartine garnets are a bright orange to orange-red. These are extremely rare. There is a type of garnet called a Mandarine garnet which is also orange. It too is rare.
There are even green garnets, even though one doesn’t associate this color with garnet. The star among green garnets is rare demantoid. It shows enormous brilliance, higher even than that of diamond. Russia’s leading court jeweler Carl Fabergé loved the brilliant green garnet from the Urals more than any other stone, and liked to use it in his creations.

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Posted by rhadika, 4:12 PM | 0 comments |

Rose Quartz

By: D.Rhadika

Who doesn’t love rose quartz in all its varying hues of pink? Rose quartz takes its name from the flower because of its translucent and delicate pink color caused by traces of iron, manganese or titanium. Rose quartz is usually very large - meaning that it doesn't form crystals. Rose quartz is found in Madagascar, India, Germany and several areas in the USA. Much rose quartz was extracted from a famous site near Custer, South Dakota, but now, most of the world's supply comes from Brazil. Rose quartz is one of the most valued varieties of quartz. The pink to rose red color is unique.

The color of rose quartz is still not completely understood. It has been said to be due to a number of different minor impurities present in the rose quartz including titanium, manganese and even colloidal gold. However, recent studies using micro-analytical methods have discovered that the color of massive rose quartz is actually due to microscopic mineral fibers in the rose quartz. X-ray diffraction tests on these microscopic fibers yielded patterns similar to the mineral dumortierite, suggesting the possibility of a totally new and as yet unknown fibrous mineral causing the color in massive rose quartz. The rare transparent crystals of rose quartz owe their coloration to aluminum and phosphorous impurities. Their pink color is photosensitive and can fade in sunlight.

Rose quartz is often called the 'love stone'. It is associated with forgiveness and compassion and can create a wonderful calming influence. It is soft and delicate inspiring feelings of love and friendship. Rose quartz is aid to help remove repressed anger and hatred and is said to remove negative influences such as jealousy and avarice. It is said to aid the spleen, kidneys and circulation system. Rose quartz also eases sexual and emotional imbalance and can also improve fertility. It makes a lovely gift as it is a symbol of love.

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Posted by rhadika, 4:11 PM | 0 comments |

Citrine

By: D.Rhadika

Citrine is any quartz crystal or cluster that is yellow or orange in color. Although, often cut as a gemstone, citrine is actually somewhat rare in nature. Citrine is one of the most affordable gemstones, thanks to the durability and availability of this golden quartz. Named from the French name for lemon,"citron," many citrines have a juicy lemon color, but like all gemstones, there is a range of colors that can be exhibited as citrine.

Citrine colors include yellow, gold to orange brown shades of transparent quartz. It’s a cheery-looking stone, and affordable and is popular as a gemstone for jewely. In ancient times, citrine was carried as a protection against snake venom and evil thoughts.

Although the darker, orange colors of citrine, sometimes called Madeira citrine after the color of the wine, has generally been the most valued color, in modern times, many people prefer the bright lemony shades which mix better with pastel colors. Citrine is generally more inexpensive than amethyst and is also available in a wide range of calibrated sizes and shapes, including very large sizes.

Sometimes you will hear citrine referred to as topaz quartz, which is incorrect. This name was used in the past in reference to the color, which is sometimes similar to the color of topaz. Since topaz is a separate mineral, this type of name can be confusing and should not be used. However, citrine is considered an alternative to topaz as the birthstone for November.

Since most citrine on the market started its life as amethyst which was heated to turn its color to gold, citrine jewelry, as well as amethyst jewelry, should be kept away from prolonged exposure to strong light or heat. With this precaution, citrine jewelry will last for many generations.

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Posted by rhadika, 4:10 PM | 0 comments |

Amethyst

By: D.Rhadika
Amethyst is a violet or purple variety of quartz often used as an ornament or jewelry. The name comes from the Greek A (not) and methuskein ("to intoxicate"), a reference to the belief that the stone protected its owner from drunkenness; the ancient Greeks and Romans wore amethyst and made drinking vessels of it in the belief that it would prevent intoxication.
Amethyst was used as a gemstone by the ancient Egyptians and was largely employed in antiquity for intaglios. Beads of amethyst are found in Anglo-Saxon graves in England.
Amethyst has been in use for thousands of years in magic, healing and psychic empowerment. Its violet color makes this one of the most sought after variety of quartz. It has a large number of qualities and uses that have been given it over the years and it is said to be a stone that radiates energy which has often been referred to as the purple ray.
It is referred to as a Spiritual Stone because its color violet is same as that of the crown chakra. Amethysts also are believed to calm emotions and reduce stress. It’s an amulet for travelers, and helps whoever holds the stone to have a more optimistic outlook and perspective. Placing it under your pillow is supposed to help induce sleep and prophetic dreams.
Some people use amethyst balls not so much for divination, but to channel knowledge and healing from the universe. It’s also used for healing in a variety of ways. If you merely hold it in your hand or keep it in your pocket, you can channel the healing powers of amethysts. Although a healing crystal doesn’t necessarily need to be amethyst, it’s one that’s often used for spiritual as well as physical healing.

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Posted by rhadika, 4:08 PM | 0 comments |

Quartz 2

By: D.Rhadika
In ancient Egypt, glazed quartz served as a substitute when no high quality examples of Turquoise could be found. The Greeks had originally named quartz, krystallos, the word for ice, but this soon came to mean any crystal. In China’s Ming Dynasty, quartz often showed up as stone in jewelry work. In Pre-Columbian America, explorations of Mixtec graves have uncovered quartz use for ear jewelry. In European history, Queen Elizabeth I’s court spiritualist’s crystal ball was Smoky Quartz, which is also the national gem of Scotland, whose national scepter included a large Smoky Quartz on its top. In modern times, it was the first crystal used in radio transmission and reception and was essential in the development of computers.
Clear quartz is of the traditional healing stones believed to draw out pain and amplify healing energy. Crystal Healers use clear quartz in rituals meant to treat convulsions, diarrhea, dizziness, exposure to radiation, general pain, hemorrhages, headaches, hypochondria and kidney diseases.
Rose quartz is used for treating cardiovascular health, fertility, headaches, kidney disease, migraines and sexual dysfunction, as well as those disorders occurring in the throat, ears, nose and sinuses.
Rose quartz is the essential stone for increasing love and for times of extreme emotional turmoil, such as divorce, bereavement or career set backs because it helps to remind the wearer of the importance of self-love. It stimulates the body’s love centers and can result in peace and fidelity in committed relationships. As one of the most important crystals for attracting love it does emotional maintenance clearing out emotional baggage, converting negative emotions, and calms hot tempers, all of which prepare us for love. The stone is also recommended for improving mental discipline and making one more responsible, and for meditation and mental tranquility.

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Posted by rhadika, Tuesday, November 11, 2008 9:21 PM | 0 comments |

Quartz Diamonds

By: D.Rhadika

While quartz is the most plentiful mineral on earth, it also provides endless fascination and beauty for experts and casual observers alike. It is found in nearly every geological environment and is at least a component of almost every rock type. It is also the most varied in terms of varieties, colors and forms. This variety comes about because of the abundance and widespread distribution of quartz. A collector could easily have hundreds of quartz specimens and not have two that are the same due to the many broad categories.
Quartz is usually clear, but in granite it is also cloudy white or grayish in color. It can also be dark (as in smoky quartz). Many gemstones are actually less common colored varieties of quartz. Examples include purple amethyst, yellow citrine, and pink rose quartz. Because quartz is so resistant to weathering due to its chemical composition and atomic bonds, it accumulates as the other minerals in a rock erode. Light colored beach, Aeolian and alluvial sand is composed of mainly quartz grains.
The use of Crystals for crystal healing or gem healing, has been linked to mental, physical, spiritual health, charkas’ energy, whose Healing Power followers of the New Age, Psychic Healing and Atlantis and Crystal Healers have long revered for relieving pain, stress, depression, anxiety in the mind, body and spirit. Spiritual Healers believe this approach to alternative medicine is essential for ensuring health.
For Spiritual Healers, no stone is as essential to their craft as quartz. Embodying all the qualities they seek, it is the quintessential healing crystal. Part of this faith they place in Quartz comes from its scientific properties that make it useful in electronic devices. From this one truth, Crystal Healers make huge leaps in logic. They believe that its crystal formation can align the harmonies within the human body, that they can “program” the crystal easily, that acupuncture needles coated with quartz are more effective, and that it has the ability to receive and send energy.

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Posted by rhadika, 9:18 PM | 0 comments |

National gem collection

By: D.Rhadika
The Smithsonian Institution in Washington, DC is home to so much that’s rare and wonderful on the planet. One of the more spectacular collections is the collection of gems in the Museum of Natural History. There you can see wonderful crystals and minerals in their natural form, as well as some of the most incredible pieces of jewelry every created. There are crowns worn by royalty, enormous diamond earrings worn by the doomed French queen Marie-Antoinette.
They’re all stunning and awe-inspiring, but nothing is more mysterious than the rare earth-green of the emerald. The Smithsonian is home to the most fabulous emeralds ever known, and we’re incredibly fortunate to have them in this country.
One such emerald is the Hooker Emerald which legend has it was once part of the belt buckle of a Turkish sultan. Another brilliant example of emerald jewelry, combined with diamonds is the Spanish Inquisition necklace. It’s a spectacular double row of diamond shapes, ending in a pendant of a chandelier shape with emeralds.
There is also a magnificent 37.8-carat emerald called the Chalk Emerald, that is set with diamonds and was found in the mines of Columbia. The Mackay Emerald Necklace is also set with diamonds and is a brilliant example of how a stone like an emerald, which often contains flaws or inclusions, is still a beautiful piece of gemstone jewelry.

The collection at the Smithsonian is not to be missed, not only for the incredible selection of emeralds it contains, but because it’s a chance to be as close to some of the world’s most fabulous gemstone necklace as most of us can ever be! We may never own anything like this, but we can dream, can’t we?

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Posted by rhadika, 9:17 PM | 0 comments |

Gachala emerald

By: D.Rhadika
Emerald, the birthstone for May, is one of the world's most valued gems. Mined by the Egyptians more than 3,500 years ago for the Pharaohs, this precious green stone also has been worshipped by the ancient Incas and Aztecs, the Indian Maharajas and Maharanis, and kings, queens and other royals all over the world throughout history.

The stone is prized for its shades of green, which represent the color of life and the eternally returning spring. For this reason, emerald has held a special religious position in many cultures.
The Gachala Emerald, an uncut 5-cm stone weight 858 carats, was found in Colombia in 1967. It was given to the Smithsonian Institute in Washington, D.C., by famous New York jeweler Harry Winston.
Another huge, rare emerald is the Sacred Emerald Buddha. It resides on the grounds of the Grand Palace in Bangkok, Thailand. This venerable image was, according to historic legend, accidentally uncovered after a lightning strike on a Chedi in Northern Thailand’s Chiang Rai district in AD 1434. The temple’s resident abbot discovered stucco flaking off the image exposing a hidden green colored Buddha statute. The remaining stucco was duly removed reveling what the world now refers to as the “Emerald Buddha.”
The Mogul Emerald is one of the largest emeralds in the world. The rectangular cut tablet, which dates back to 1695, weighs 217.80 carats and is about 10 cm high. One side is inscribed with Islamic prayers and the other is engraved with opulent flower ornaments. The emerald is thought to have come from the reign of Emperor Aurangzeb --the last of the great Mogul rulers, who controlled much of India. It was discovered in Colombia by the Spanish conquistadors and most likely arrived in India through trade during the Mogul dynasty, according to experts. The emerald was auctioned off at Christie's of London for $2.2 million to an anonymous buyer in 2001.

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Posted by rhadika, 9:16 PM | 0 comments |

Emerald Diamonds

By: D.Rhadika
Emerald has one of the longest histories of all gemstones. The first known emerald mines were in southern Egypt and were operated from before 1000 BC into the 1700's. This is a testament to the high value people have placed on emeralds for many centuries as the work was hard and dangerous and the stones small and poor by today's standards. Treasured for at least 4,000 years by different cultures all around the world, emerald is said to quicken the intelligence as well as the heart. Legend gives its owner the gift of eloquence.
In contrast to other beryl gemstones, emerald is typically heavily flawed with cracks and inclusions of fluid and minerals. These inclusions are called "jardin" (or garden) as they typically resemble leaves and branches. These characteristics are not looked upon as negative aspects for emerald as they would be for other gemstones. Indeed, these inclusions are considered part of the character of the stone and are used to assure the purchaser that the stone is genuine. Because emeralds are so rare without inclusions, some inclusions are expected and do not detract from the value of the stone as much as with other gemstones. Most emeralds on the market today have been treated with various types of oil or resin to improve their appearance.
Emeralds are cut in Jaipur, India and Tel-Aviv, Israel as well as in the mining countries, such as Brazil. Emerald is one of the most difficult gemstones to cut because of the high value of the rough stone and the many inclusions found in crystals. Small changes in orientation can make a large difference in the final appearance of the gem. Skilled craftsman who specialize in cutting emerald can be found in cities around the world for jewelers who insist on having stones perfected for the optimum brilliance and vibrancy.

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Posted by rhadika, 9:14 PM | 0 comments |

Beryl colors

By: D.Rhadika

As much as we love diamonds, we’re also in love with colored stones and gems like aquamarines and morganite, which can range from peach to lavender in color, are becoming more and more prevalent in gemstone jewelry.

Beryl is the mineral from which emeralds are created. But beryl comes in a variety of colors, making it a versatile gem. Morganite is probably the most popular of the other beryls. It has a pastel pink to peach or lavender which is similar in intensity to the blue of aquamarine. Morganite has been marketed as "Pink Emerald" and "Pink Aquamarine" to emphasize the kinship to its popular cousins. It was first discovered in California. It was also discovered in 1908 in Madagascar. There are also deposits in Brazil, Mozambique, Namibia, Afghanistan, and Russia. However, morganite is relatively rare, which stands in the way of it becoming a jewelry stone.

Heliodor, or golden beryl, is named after the Greek words for sun - helios - and gift - doron. The sunny yellow color of this beryl lives up to its name. Heliodor was discovered in Namibia in 1910 in a pegmatite that also produced aquamarine, which is also colored by iron. Heliodor is also found in Brazil and Madagascar. The largest faceted heliodor, 2,054 carats, is on display at the Smithsonian Institution in Washington D.C.

Red beryl is the rarest member of the beryl family. It is mined in only one place: the Wah Wah Mountains in Utah. The color is stoplight red. Unfortunately this deposit produces only a small quantity of this gem. Most of the gems produced are under a carat in size, and many have inclusions. Specimens that are over a carat and clean are fantastically rare and are priced as such.
Colorless beryl, which is also known as goshenite, is also relatively rare. It is named after a deposit where it was found in Goshen, Massachusetts. The Greeks used colorless beryl as lenses; the first spectacles were probably beryl.

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Posted by rhadika, 9:13 PM | 0 comments |

Common and uncommon gemstones

By: D.Rhadika

Gemstones quite literally can take our breath away when we see them. Who hasn’t seen a beautiful diamond or sapphire ring and exclaimed over it? Is it only their beauty that makes them so valuable? Why else are they valuable to us?

Most gemstones are minerals that occur naturally in the earth. The most common is quartz, which is made of silicon and oxygen, two of the most common chemicals or substances on the planet. Even though most people don’t find such crystals unless specifically looking for it, it’s still relatively common in the gem world.

One quality that determines the value of a gem is how rare it is. A diamond, believe it or not, is actually a more common gemstone. However, the sales and distribution of diamonds are tightly controlled, which keeps the demand for diamonds of any characteristic in high value. Certainly perfect, flawless diamonds are truly rare, but diamonds themselves aren’t particularly rare.

Other gemstones are much rarer, such as sapphires and rubies, which are part of the beryl family of minerals. Rubies are rarer than sapphires and top quality colors in both are extremely rare.

A mineral called benitoite is found only in the San Benito valley in California, where only a few hundred carats of it are found each year. It is the state gem of California and is a hexagonal-shaped crystal. It can be cut and polished to produce sapphire-colored gemstone jewelry.

Some gems are even rarer than bentitoite. They’re so rare, that only three or four of them exist in the world. And the location where the gemstone was found can make a big difference as well. While peridot is a fairly common gem, there were actually several carats of peridot discovered in a meteorite, making that one of the rarest gems ever!

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Posted by rhadika, 9:11 PM | 0 comments |

Beryl Diamonds

By: D.Rhadika

The beryl is the family of crystal that creates emeralds and aquamarines, when its color is green or blue-green, respectively. Red beryl is bixbite or red emerald or scarlet emerald, pink beryl is morganite, white beryl is goshenite, and a clear bright yellow beryl is called golden beryl. Other shades such as yellow-green for heliodor and honey yellow are common. It can also come in violet.

The earliest known source of emerald was near the Red Sea in Egypt, the so-called Cleopatra's emerald mines. They were probably worked from about 2000 B.C., apparently the location of them was lost in the middle ages, and not rediscovered until 1818. Most emeralds used in ancient jewelry are believed to have come from these mines. They are not worked nowadays because of the low quality of crystals found.
Emeralds have been found in Austria since Roman times; these are no longer commercially mined.

Columbia is generally recognized as the source of the world's finest quality emeralds, both in the past and the present. The Columbian Indians were using them before 1537, when Quesada conquered Columbia. Russia has been another important source of emeralds in the past. Emeralds were discovered in Australia in 1890 in New South Wales. Emeralds were discovered between1927 and 1929 in South Africa, followed by other sources. Another important source of superb quality emeralds, usually only of small size, is in Zimbabwe formerly Southern Rhodesia. These were discovered only in 1956. Emeralds were known in India from antiquity, but their source is not certain. The quality of Indian emeralds is very variable, but most are polished as beads. Other sources of emerald include Norway, North Carolina, Connecticut, Maine, New Hampshire, although none of these are very important. But if you’re vacationing in any of those states, we best you’ll keep your eyes peeled for any stray beryls!

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Posted by rhadika, 9:10 PM | 0 comments |

Sri Lanka Diamonds

By: D.Rhadika
One of the world’s most beautiful and exotic islands, Sri Lanka, (formerly Ceylon) lies just below the southern tip of India. This pear-shaped bit of tropical paradise, about the size of Sicily, is a tourist’s delight offering British teahouses, rubber plantations, and gem mines.
Marco Polo wrote of his visit in 1292: “I want you to understand that the island of Ceylon is, for its size, the finest island in the world, and from its streams comes rubies, sapphires, topazes, amethyst and garnet.” Little has changed since Marco Polo’s time except that Sri Lanka faces overpopulation and a faltering economy.
Its gemstones, however, seem to occur in endless supply. Known as the “Jewel Box of the Indian Ocean,” Sri Lanka, like possibly no other locality on earth, has yielded precious stones and fine gems in a great profusion of gem species and varieties. The island was known in the ancient world as Taprobane (copper colored in Greek). Native Veddahs, bathing in smooth flowing streams, noticed colored pebbles scattered in sandy bottoms. It was not until 500 B.C. that conquering Buddhists from northern India also discovered gems in the rivers and began to set rough stones into crude jewelry. They bartered stones with traders from abroad and eventually the treasures found their way to the marketplaces of Asia and Europe. Ancient Greek and Chinese historians referred to the beautiful gems of Ceylon, and King Solomon reportedly wooed the Queen of Sheba with Ceylonese precious stones.
The crown jewels of royalty all over the world contain extraordinary spinels, sapphires, and zircons mined from Sri Lanka streams. The Imperial Treasury of the Soviet Union houses a 400-carat red spinel of great beauty which was once given to Catherine the Great. The British Imperial Crown features a giant oval-cut spinel (previously supposed to be a ruby), known as the “Black Prince.” Crowns in the Green Vaults of Dresden are covered with sapphires from Sri Lanka.

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Posted by rhadika, 9:08 PM | 0 comments |

Hindu lore rubies

By: D.Rhadika

Rubies are a type of corundum, a rare mineral made up of densely packed aluminum and oxygen atoms, which are normally colorless. When other atoms are substituted for a few of the aluminum ones, bright hues emerge. Small amounts of chromium impart the deep red color of ruby, traces of titanium and iron produce the stunning blue of sapphire, and chromium and ferric iron create the delicate orange shades of the extremely rare and costly padparadscha.
Rubies with their fiery hearts have inspired passion and legends throughout history. Rubies are even more rare than was once believed. Since chemical testing has become more common, it's been discovered that many of the world's most famous rubies are not rubies at all, but either garnet or spinel. While still beautiful, they don't possess the hardness nor the rich depth of color found in true rubies.
The color of rubies has given rise to numerous legends, associating the gemstone with courage, power, devotion, passion and love. In Hindu lore, rubies were believed to be the crystallized blood of the demon, Vala, whose body seeded all the mines of the world. When his body was divided, his blood fell over Sri Lanka and Burma, creating the rubies that can be mined from the ground. The sparkle and luminescence of rubies is said to be created by an inextinguishable fire in the heart of the stone. The fire is linked to the life of the person who wears it or owns it, and as long as the ruby burns bright, it is said, the person will enjoy good fortune and good health. So clear is this connection, according to some legends, that a ruby will darken in color if its wearer's life is in danger. In healing, rubies are the gem of choice to cure diseases of the blood and the heart.

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Posted by rhadika, 9:06 PM | 0 comments |

Ruby and Sapphire

By: D.Rhadika

It’s hard to imagine that a mineral with a name as mundane as corundum yields gems as exquisite as the ruby and sapphire, or even that these two stones, so different in color and mystique, are actually the same mineral family.

Lucky you if your birthstone is sapphire (September) or ruby (July). These are among the richest-colored of all gemstones with a romance and history as colorful as they are. Rubies are actually rarer than sapphires, and only red corundums are called rubies. Any other color is a sapphire. When grading colored stones, the density and hue of the color are part of the evaluation, and it’s the richest, deepest colors that are the most prized. In rubies, the most prized variant of color is called pigeon’s blood. Large gem quality rubies can be more valuable than comparably sized diamonds and are certainly rarer. There is a relative abundance of smaller, (1-3 carat,) blue sapphires compared to the scarcity of even small gem quality rubies, making even these smaller stones relatively high in value.

Stones of Burmese origin generally command the highest prices. The vast majority of rubies are "native cut" in the country of origin. High value ruby rough is tightly controlled and rarely makes its way to custom cutters. Occasionally, such native stones are recut to custom proportions, albeit at a loss of weight and diameter. Custom cut and recut stones are usually more per carat.

Sapphires exist in all the shades of blue from the deep blue of evening skies to the bright and deep blue of a clear and beautiful summer sky. Sapphires also come in many other colors, not only in the transparent grayish misty blue of far horizons, but also displaying the bright fireworks of sunset colors – yellow, pink, orange and purple. So sapphires are really and truly heavenly stones, although they are being found in the hard soil of our so-called "blue planet”.

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Posted by rhadika, Monday, November 10, 2008 9:20 PM | 0 comments |

Corundum

By: D.Rhadika

Corundum is the form of mineral from which sapphires and rubies are derived. The mineral is naturally clear, but can have different colors when impurities are present. Transparent corundums are used as gems, and if they’re red, then they’re rubies, while all other colors are called sapphire. The word corundum comes from the Tamil kurundam Due to corundum's hardness (typically 9.0) it is commonly used as an abrasive in machining, from huge machines to sandpaper. Emery is an impure and less abrasive variety, with a Mohs hardness of 8.0. You’ve probably used corundum hundreds of times when you’ve filed your nails with an emery board!

Corundum is actually the second hardest substance on the earth, after the diamond, and as such has many industrial uses. Corundum is crushed, ground and screened to varying grain sizes. The grains are utilized in the manufacture of grinding wheels for flour and rice mills, and workshops. Grinding wheels are manufactured either by a mixture of corundum, clay and feldspar or by using sodium silicate as a bonding agent. Finer grains are utilized for the preparation of grinding-pastes for the automobile industry. Corundum paper and cloth finished to belts, discs, rolls, sheets and other shapes are prepared by giving a suitable coating generally of sodium silicate.

Due to its hardness corundum also finds use in mortars, wire drawing dies, thread guides and gauge blocks. Gem varieties are sometimes used for pivot supporters in delicate scientific instruments, as jewel bearing in watches.

Corundum in small quantities is used in the manufacture of special sparking plugs, mufflers, pyrometer tubes, rods and insulators for vacuum tubes of all kinds. Finely ground corundum, passing through 200 mesh, is used for the manufacture of the above products by giving them a bond of clay.

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Posted by rhadika, 9:18 PM | 0 comments |

Heat conduction

By: D.Rhadika
Except for most blue diamonds, which are semiconductors, diamonds are good electrical insulators, meaning they reduce the flow of electricity. Blue diamonds owe their semi-conductive property to boron impurities, which act as a doping agent and cause p-type semiconductor behavior. Diamonds appear cold and hard, but they’re good conductors of heat because of the strong chemical bonds within the crystal.

Most natural blue diamonds contain boron atoms which replace carbon atoms in the crystal matrix, and also have high thermal conductivity. Heat is a property contained in most materials, and has the tendency to flow to areas of lesser heat. A substance that is a thermal insulator reduced the flow of heat.

Diamonds are actually excellent conductors of heat, better than more well-known heat conductors like copper or silver. Diamonds will warm-up. It’s as if when we talk about a diamond’s “fire,” it can refer to it figuratively as well as literally!

As much as we associate diamonds for their beauty and use as jewelry, only about 20% of all diamonds mined are gem-quality. The rest are good only for industrial uses. Because it’s the hardest substance, it’s used to cut other materials such as stone, metal and concrete. It’s also used to grind eyeglasses and computer chips.

Most industrial diamonds are mined, but scientists have successfully engineered synthetic industrial diamonds that have more versatile uses than mined diamonds. Now major companies like GE and even DeBeers make synthetic diamonds. The primary use for these synthetic industrial diamonds is to conduct heat away from devices that require a constant temperature for safe and proper operation.

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Posted by rhadika, 9:17 PM | 0 comments |

Industrial vs gem quality diamonds

By: D.Rhadika
Diamonds are the hardest known naturally occurring material Its hardness has been known since ancient times, and is the source of its name. However, there have been synthetic diamonds created which are even harder.
The hardest natural diamonds in the world are diamonds from the New England area in New South Wales, Australia. These diamonds are generally small, and are used to polish other diamonds.
Industrial use of diamonds has historically been associated with their hardness; this property makes diamond the ideal material for cutting and grinding tools. It is one of the most known and most useful of more than 3,000 known minerals. As the hardest known naturally occurring material, diamond can be used to polish, cut, or wear away any material, including other diamonds. Common industrial adaptations of this ability include diamond-tipped drill bits and saws, or use of diamond powder as an abrasive. Other specialized applications also exist or are being developed, including use as semiconductors: some blue diamonds are natural semiconductors, in contrast to most other diamonds, which are excellent electrical insulators. Industrial-grade diamonds are either unsuitable for use as gems or synthetically produced, which lowers their price and makes their use economically feasible. Industrial applications, especially as drill bits and engraving tools, also date to ancient times.
The hardness of diamonds also contributes to its suitability as a gemstone. Because it can only be scratched by other diamonds, it maintains its polish extremely well, keeping its luster over long periods of time. Unlike many other gems, it is well-suited to daily wear because of its resistance to scratching—perhaps contributing to its popularity as the preferred gem in an engagement ring or wedding ring, which are often worn every day.

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Posted by rhadika, 9:16 PM | 0 comments |

Diamond durability

By: D.Rhadika

Diamonds are among the hardest substances on earth; in fact they use diamonds and diamond dust to cut diamonds. Other gemstones are hard as well, but not nearly as hard as a diamond. Diamonds and other gemstones are measured by the Mohs scale. It runs from 10 (hardest) down to 1 (softest). It is somewhat arbitrary and not linear. The range from 9 to 10 is much greater than 8 to 9.Harder minerals of course tend to be more durable and will not scratch easily. They’re good choices for jewelry because of their ability to withstand changes in elements or the arbitrary scratch or knock. Talc, with a Mohs hardness of 1, is the softest mineral and can be scratched with a fingernail.

Quartz is the most common gem mineral (citrine and amethyst) and ranges at 7 and above. Rubies and sapphires are nearly as hard as diamonds, with a scale of 9 on the Moh’s scale.
People mistakenly think diamonds are indestructible and this is not true! Pliny the Elder in his Natural History stated that “these stones are tested upon the anvil, and will resist the blow to such an extent as to make the iron rebound and the very anvil split asunder.” If you tried that, however, you would more likely shatter the diamond, rather than the anvil!
Many diamonds are cut to prevent accidental nicks, scratches and breaks. Except for the Princess cut, which is a square-cut diamond with pronounced corners, most corners on angular diamonds are rounded. A protruding point of a square or rectangular diamond could inadvertently be knocked against a surface and chip or scratch.
Your diamond should be protected in a soft, velvet-lined case if you’re not wearing it. Have the setting checked periodically and have the stone examined by a professional. Your diamond is not only an investment in money, but an investment in yourself or your relationship and is worth the small amount of extra care it takes to preserve it forever!

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Posted by rhadika, 9:14 PM | 0 comments |

Diamond mines

By: D.Rhadika
The very mention of diamond evokes fantasies of fabulous riches and dreams of love and power. Up to the Middle Ages they were so rare and expensive that only royalty could afford diamonds. But in modern times even ordinary people are able to possess a few, thanks to the discovery of numerous diamond deposits elsewhere on the planet plus high, albeit controlled, production.
Diamonds were discovered in India by the 4th century BCE. In addition to the diamond legends, India yielded many legendary diamonds, including the Koh-i-Noor, the Orlov, the Hope, and the Sancy. Today the Majhgawan pipe, a primary source near Panna, is the India’s only producing diamond source.
At one time, India appears to have been the only source of this valuable gem until about the early eighteenth century when diamonds were discovered in Borneo and later elsewhere, such as in South Africa and Russia. Although ancient Sanskrit texts mention several areas where diamonds were found, verifiable historical records are available for only a few deposits. Mining activities in southern India – which in its time was the leading producer of this gem and had yielded some of the most famous stones in history – gradually declined and had become defunct by the time diamonds were discovered elsewhere in the world.
The 1867 discovery of diamonds in the Cape Colony, now a province in South Africa, changed forever the supply and marketing of diamonds. As annual world diamond production increased exponentially, a once extremely rare material became more accessible to Western society with its growing wealth, science learned that diamonds came from volcanoes, and everyone learned of Cecil John Rhodes, Barney Barnato, Kimberley, and De Beers. Today South Africa maintains its position as a major diamond producer. If not for the controlled production and distribution of the South African diamond mines, diamonds could have been easily devalued and lost much the mystique they hold for us today.

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Posted by rhadika, 9:12 PM | 0 comments |

How diamonds made

By: D.Rhadika


Diamonds form between 75-120 miles below the earth's surface. According to geologists the first delivery of diamonds was somewhere around 2.5 billion years ago and the most recent was 45 million years ago. The carbon that makes diamonds comes from the melting of pre-existing rocks in the Earth's upper mantle. There is an abundance of carbon atoms in the mantle. Temperature changes in the upper mantle forces the carbon atoms to go deeper where it melts and finally becomes new rock, when the temperature reduces. If other conditions like pressure and chemistry is right then the carbon atoms in the melting crystal rock bond to build diamond crystals.

There is no guarantee that these carbon atoms will turn into diamonds. If the temperature rises or the pressure drops then the diamond crystals may melt partially or totally dissolve. Even if they do form, it takes thousand of years for those diamonds to come anywhere near the surface.

It takes millions of years to make a diamond. When you own a diamond, you own something which is a legend in the making. It has not been made in a factory just the other day. A diamond comes from the bosom of the earth. More interestingly not all the diamonds mined are made into jewelry. Only one fourth of the diamonds that are mined are made into jewelry. Every 100 tons of mud produces one carat of a diamond. And this one carat is not one stone! It could be anything from 0.005 ct to 1 ct. because much of the original stone is cut away in the process of cutting, shaping and polishing the diamond.

Diamonds come in different rough shapes. The next time you look at your diamond, think about the amount of time, energy and resources have gone into making that one.

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Posted by rhadika, 9:11 PM | 0 comments |

American Topaz

By; D.Rhadika

The world’s largest cut topaz, called the American Topaz, resides at the Smithsonian Institution in Washington, DC. A 172-faceted topaz weighing 22,892.50 carats (5785 kg), it’s the largest cut yellow topaz in the world, and one of the largest faceted gems of any kind in the world. Originating from Minais Gerais, Brazil, it was cut over a period of two years. It was purchased by the Rockhound Hobbyists of America and presented to the Smithsonian Institution in 1988.

As stunning as this cut topaz is, another display at the Smithsonian is equally dazzling and awe-inspiring. That’s a sherry-colored topaz “spray” from the Thomas Range in Utah. This color of topaz can be found in Mexico and Utah, but when it’s exposed to sunlight, will become clear.

Other spectacular displays of natural crystals include a cluster of Stibnite, an ore of antimony, which has a bright metallic luster. This spectacular group of crystals is from Iyo, Japan and look like something from Superman’s home!

Another huge mineral in the exhibit is the Smithsonite, named for James Smithson, who bequeathed the funds to establish the Smithsonian Institution. He first discovered this greenish zinc carbonate mineral from the Kelly Mine in New Mexico.

Some of the other don’t miss items in the Smithsonian’s Gem Collection are the Smithsonian Canary Diamond, a huge canary and diamond ring. The 98.6-carat Bismarck Sapphire is also part of the collection and is one of the world’s largest sapphires. It originally came from Sri Lanka. It’s also fascinating to see some of these gems in their raw uncut state, such as the large corundrum crystal which is the mineral that sapphires are made of, and a very large beryl crystal, from which the emerald and aquamarine family of stones is derived.

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Posted by rhadika, 9:09 PM | 0 comments |

Victoria Transvaal Diamond

By: D.Rhadika
The Victoria-Transvaal is a 67.89-carat, brownish-yellow pear shaped stone. It was cut from a 240-carat crystal that was found in the Transvaal, South Africa. The first cutting produced a 75-carat 116-facet stone that measured 1 x 1³/8 inches; a recutting retained the same length and width, but reduced the depth to better proportions, making it more brilliant. The diamond has been featured in several Hollywood films, including a Tarzan episode from 1952 titled Tarzan's Savage Fury, and in leading exhibitions in the United States and Canada.
The necklace was designed by Baumgold Brothers, Inc, and consists of a yellow gold chain with 66 round brilliant-cut diamonds, fringed with ten drop motifs, each set with two marquise-cut diamonds, a pear-shaped diamond, and a small round brilliant-cut diamond (the total weight of the 106 diamonds is about 45 carats). The configuration of these stones makes them look like small angels! The necklace was donated by Leonard and Victoria Wilkinson in 1977 to the Smithsonian Institute, Washington D.C.
Other colored diamonds in the Smithsonian Collection include the 8.30-carat Shepard Diamond. This stone is from South Africa, and was acquired by the Smithsonian Museum in exchange for a collection of small diamonds that had been seized as smuggled goods by the United States Customs Service. The diamond is named for the Smithsonian employee who helped facilitate the transaction.
An extremely rare red diamond resides at the Smithsonian as well. This is the De Young Red, a 5.03-carat, brilliant cut red diamond. The main kite-shaped facets on the crown are divided in two, giving the stone more brilliance than a standard round brilliant cut. The stone is not pure red but has a slight brown hue, which makes it appear like a fine red garnet and indeed, it was once purchased as such at an estate sale.
It is the third largest red diamond in the world, after the Moussaieff Red (5.11 carats) and the Red Diamond (5.05 carats).

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Posted by rhadika, Friday, November 7, 2008 7:20 PM | 0 comments |

Hooker emerald

By: D.Rhadika

There’s something incredibly mysterious about the largest emeralds. It’s one of the rarest of gemstones, unattainable for most of us, at least in a good-quality stone. This magnificent 75.57-carat emerald was supposedly owned by the Ottoman Empire until 1900. Legend has it was used in the belt buckle of a sultan!

The stone was featured in Tiffany's 1950 Christmas Catalog. Mrs. Janet Annenberg Hooker bought the stone in 1955 from Tiffany's and donated it to the museum in 1977.
Emeralds are part of the beryl family of jewels. Green beryls are called emeralds, while blue-green beryls are called aquamarines. A pink shade of beryl is called Morganite. There’s even a red beryl that’s rarer than emeralds themselves.

The name emerald comes from the Greek smaragdos via the Old French esmeralde, and really just means 'green gemstone'. Innumerable fantastic stories have grown up around this magnificent gem. The Incas and Aztecs of South America, where the best emeralds are still found today, regarded the emerald as a holy gemstone. However, probably the oldest known finds were once made near the Red Sea in Egypt. Having said that, these gemstone mines, already exploited by Egyptian pharaohs between 3000 and 1500 B.C. and later referred to as 'Cleopatra's Mines', had already been exhausted by the time they were rediscovered in the early 19th century.

But it has also, for centuries, been the color of beauty and of constant love. In ancient Rome, green was the color of Venus, the goddess of beauty and love. And today, this color still occupies a special position in many cultures and religions. Green, for example, is the holy color of Islam. Many of the states of the Arab League have green in their flags as a symbol of the unity of their faith. Yet this color has a high status in the Catholic Church too, where green is regarded as the most natural and the most elemental of the liturgical colors.

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Posted by rhadika, 7:18 PM | 0 comments |

Portuguese diamond

By: D.Rhadika

There’s something so exciting about these incredibly large and perfect stones. Sometimes they have well-documented histories and we know where they came from and who owned them and when. But others have a past that’s not as well-known, and that only adds to the romance and mystique surrounding them.

One such diamond is called the Portuguese Diamond and is a 127-carat, cushion-cut diamond, shaped in an octagonal emerald shape. It’s nearly flawless. While it’s called the Portuguese Diamond, with a story that it was mined in Brazil and became part of the Portuguese Crown Jewels, there’s really no true documentation that says definitively that that’s where the diamond was mined. Must of the diamond’s history is pure legend and conjecture. One can only imagine who wore this incredible stone!
One part of the diamond's history that is well-documented is that in February 1928 Peggy Hopkins Joyce traded a $350,000 pearl necklace for the diamond and $23,000 in cash. According to New York newspaper accounts, it was mounted on a diamond-studded platinum choker to be worn close around the throat (probably the same necklace described above). Miss Joyce performed in the Ziegfeld Follies, and had six husbands, at least five of whom were wealthy. She was said to be almost as fond of jewels as of men. Sometime prior to 1946 Miss Joyce placed the diamond on consignment to the group of jewelers mentioned above, in an unsuccessful attempt to sell it.
Harry Winston acquired the Portuguese Diamond from Miss Joyce in 1951, and for the next several years it traveled the country as part of his "Court of Jewels" exhibition. In 1957, Winston sold the diamond to an international industrialist, who then traded it back in 1962. In 1963, the Smithsonian acquired the Portuguese Diamond from Mr. Winston in exchange for 2,400 carats of small diamonds.

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Posted by rhadika, 7:16 PM | 0 comments |

Spanish Inquisition Necklace

By: D.Rhadika

One doesn’t normally associate beautiful jewelry with the time of the Spanish Inquisition. But in the Smithsonian Institution’s collection of gems, there is an exquisite necklace of diamonds and emeralds.

It is a spectacular double row of diamonds and emeralds ending in a chandelier of emeralds. There is unfortunately very little information about the provenance of this necklace. The large diamonds and Columbian emeralds were most likely cut in India in the 17th century. This would make them one of the earliest examples of cut gemstones in the Smithsonian’s Collection. There are really only legends surrounding this necklace. They indicate that it was worn at times by Spanish and French royalty. In the early 20th century, it was purchased by the Maharajah of Indore, whose son sold the necklace in 1947 to Harry Winston. Winston subsequently sold the necklace to Mrs. Cora Hubbard Williams of Pittsburgh. She bequeathed it to the Smithsonian in 1972.

Emeralds are a form of crystal known as beryls. Beryls are normally clear crystals, but when infused with chromium or vanadium, they attain various gradations of green. The purest green are the rarest emeralds and many people actually prefer an emerald that has a blue-green tint.

Before the 16th century, the only known emerald deposits were in Cleopatra’s Egyptian mines. But after emeralds were discovered in Columbia, those became the “gold standard” in emeralds. Columbian emeralds have been discovered by archaeologists among artifacts of such tribes as the Inca, Maya, Aztec, Toltec and the lesser-known Chibcha Indians. Emeralds are among the rarest of gemstones and can be more expensive per carat than even the finest diamonds! They are a hard mineral, with a Moh’s hardness scale of 7 or 8 (compared to a diamond’s 10). While most emeralds are found in Africa, Russia and Africa, there have been discoveries of emerald deposits in North Carolina!

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Posted by rhadika, 7:14 PM | 0 comments |

Marie Antoinette Earrings

By: D.Rhadika

There’s no more fascinating subject in history than the doomed French Queen Marie Antoinette. Much maligned by history (she never said “Let them eat cake,” in response to the people’s need for bread), she was an unwilling part of the one of the greatest revolutions in history. And met an untimely end at the guillotine in 1793. While she loved jewelry, and possessed many magnificent jewels, she often preferred simple muslin gowns and very little jewelry. Many of the portraits of her by Elisabeth Vigee-Lebrun show her dressed just like that.

Two large, pear-shaped diamond earrings, weighing 14.25 and 20.34 carats respectively, are part of the Smithsonian Institution’s collection. The diamonds once were supposedly set in earrings that belonged to Marie Antoinette and some sources say they were her favorite pieces of jewelry and she wore them constantly. They were taken from her during an attempt to flee France as the Revolution dawned and the position of the Royals became dangerous.

The diamonds were later acquired by the Grand Duchess Tatiana Yousupoff of Russia. When jeweler Pierre Cartier puchased the diamond earrings in 1928, their authenticity was attested to in an affidavit by Russian Princess Zenaide Yousupoff and her son, Prince Felix Yousupoff, stating that they originally belonged to Queen Marie-Antoinette and have never been reset in the one hundred years that they were in the family. Marjorie Merriweather Post acquired the earrings from Pierre Cartier in October 1928. Harry Winston reset the large diamonds in platinum replicas of the original silver settings in 1959. Cartier, Inc. designed the triangular tops. In November 1964, Mrs. Post's daughter, Mrs. Eleanor Barzin, donated the earrings, along with the original setting to the Smithsonian Institution. The diamonds are originally from India or Brazil, the only significant sources of diamonds in the eighteenth century.

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Posted by rhadika, 7:11 PM | 0 comments |

Marie Louis Diadem

By: D.Rhadika

There were a few benefits to marrying the Emperor Napoleon, if you loved jewelry, that is! The Marie-Louise diadem, now part of the Smithsonian Collection, was a wedding gift from Napoleon I to his second wife, Empress Marie-Louise in 1810. The diadem was originally part of a set that also included a necklace, comb, belt buckle, and earrings, all made of emeralds and diamonds set in silver and gold. They were all made by French Jeweler Etienne Nitot et Fils of Paris.

In the original diadem, there were 22 large and 57 small emeralds, along with 1002 brilliant-cut and 66 rose-cut diamonds. The central emerald weighed 12 carats. After the fall of the Emperor, Marie-Louise fled to Vienna and took her personal jewelry with her, including the diadem and other pieces that were made as part of a set, including a necklace, a pair of earrings and a comb.

Empress Marie-Louise left the diadem to her Hapsburg aunt, Archduchess Elise. Archduke Karl Stefan Hapsburg of Sweden, a descendent of the Archduchess sold the set to Van Cleef & Arpels in 1953. Between May 1954 and June 1956, the emeralds were removed and sold individually in pieces of jewelry as emeralds "from the historic Napoleon Tiara."

Between 1956 and 1962, Van Cleef & Arpels mounted turquoise cabochons into the diadem. In 1962, the diadem was displayed in the Louvre in Paris with the necklace, earrings, and comb in an exhibit about Empress Marie-Louise. In 1971, Marjorie Merriweather Post, heiress to the Post cereal fortune, purchased the diadem for the Smithsonian Institution. There are 1,006 mine-cut diamonds weighing a total of 700 carats and 79 Persian turquoise stones weighing a total of 540 carats. In one respect, it’s a shame that the original piece was dismantled to sell off the emeralds. Yet the diadem, reset with the turquoise cabochons is equally beautiful and made even more distinctive with the use of the less valuable turquoise.

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Posted by rhadika, 7:10 PM | 0 comments |

Blue Heart Diamond

By: D.Rhadika

There is a spectacular diamond in the Smithsonian Collection called the Blue Heart Diamond. Fans of the movie Titanic might think the “Heart of the Ocean Diamond” was based on this stone, and it may have been! However, this diamond hasn’t been cast in the ocean, but is safe and sound at the Smithsonian!

It has also been called the Eugenie Blue Diamond, although it’s uncertain that the Empress Eugenie ever owned this particular stone. It was cut in Paris between 1909 and 1910, but the stone’s origin – Africa or India – is unclear.

It is an enormous heart-shaped, blue diamond weighing 30.82 carats. Its current setting is in a platinum ring, surrounded by white diamonds. It changed hands among famous jewelers – such as Cartier and Van Cleef & Arpels - and owners until it was bought by Harry Winston in 1959 who mounted the diamond in its current ring setting. Winston sold the ring to Marjorie Merriweather Post. Mrs. Post donated the ring to the Smithsonian and it remains there with other famous blue diamonds, including the Hope Diamond and the Heart of Eternity Diamond.

These famous blue diamonds have recently gone through a grading and examination process, to classify their colors and to determine the source of the color. The Hope Diamond is classified as Fancy Deep Grayish-Blue. The Heart of Eternity has been classified as a Fancy Vivid Blue. The Blue Heart Diamond has not yet been classified, but some experts categorize it as either Fancy Vivid Blue or Fancy Deep Blue. Blue diamonds are of particular interest to scientists not only because of the color and the impurities that create it, but because blue diamonds also have an electric conductive property that makes them unique among clear and other colored diamonds.

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Posted by rhadika, Thursday, November 6, 2008 9:42 PM | 0 comments |

Napoleon Diamond Necklace

By: D.Rhadika

One of the most spectacular all-diamond pieces of jewelry in the Smithsonian Insitution is the Napoleon necklace. Thought to have originally been owned by Catherine the Great of Russia, it was presented by the Emperor Napoleon of France to his second wife, Marie-Louise of Austria on the birth of their son in 1811. The silver and gold set necklace contains172 diamonds weighing 275 carats - 28 oval and cushion-cut diamonds, dangling 19 briolette-cut oval and pear shaped diamonds and accented by small, round diamonds and diamond set motifs in a silver and gold setting. The diamonds are cut in "old mine" style, the precursor to the modern brilliant cut, and have a high degree of fire (flashes of color as the stone moves in light), but less brilliance due to less light refraction through the top of the stone.

The necklace has an estimated total gem weight of 275 carats, and the largest single diamond on it weighs approximately 10 carats. When Marie-Louise died in 1847, the necklace was given to her sister-in-law, Archduchess Sophie of Austria, who removed two stones to shorten the necklace. Earrings were made with the two removed stones, the whereabouts of which are unknown.

In 1872, the necklace was bequeathed to the Archduchess' son, Archduke Karl Ludwig of Austria. In 1948, Archduke Ludwig's grandson, Prince Franz Joseph of Liechtenstein, sold the necklace to a French collector who then sold it to Harry Winston in 1960. Marjorie Merriweather Post obtained the necklace from Winston and donated it to the Smithsonian Institution in 1962.

It’s difficult to value a piece like this in today’s market. However, in 1993, the auction house Christie’s in Geneva sold another necklace that Napoleon had given to Marie-Louise that was composed of rubies and diamonds. This necklace sold for $13 million.

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Posted by rhadika, 9:41 PM | 0 comments |

Hope Diamond

By: D.Rhadika

Is there anyone who hasn’t at least heard of the famous Hope Diamond? Many people are surprised when they first learn that this famous stone isn’t a clear diamond, but instead is a brilliant blue stone, surrounded by white diamonds and suspended from a diamond necklace.

It first appears in history in the mid 1600s when it was purchased by a merchant named Jean Baptiste Tavernier, who sold the stone to Louis XIV of France. At that time it was a 112-carat stone, described as having a beautiful violet color. It was recut into a 67-carat stone and the color was named French Blue. During the French Revolution, the diamond was stolen during a looting of the crown jewels. It reappeared in 1812, but recut once again and was acquired by George IV of England who had to sell the stone to pay off debts. The exact transaction is unknown, but the diamond is next found as an entry in the collection of Henry Philip Hope, whose name is attached to the diamond to this day.

Eventually the stone was owned by the Cartier jewelry firm in Paris and purchased by Evalyn Walsh Maclean of Washington, DC. It was at her request that the stone was reset and made into the necklace that we know of today. It was acquired by Henry Winston who purchased it from Mrs. Maclean’s estate in 1947 and eventually became part of the Smithsonian Collection.

There is a long-standing legend of a curse attached to the Hope Diamond, which the story says was plucked from an idol in India. True or not, many who have owned the Hope Diamond have met with misfortune, including the Hope family, who supposedly went bankrupt from owning the diamond. It’s possible that the whole concept of the curse originated with Pierre Cartier who sold it to Mrs. Maclean with the story of a curse, because she thought objects surrounded with bad luck were actually good luck for her. Sadly, Mrs. Maclean’s first son was killed at age 9 in a car accident and her 25-year old daughter committed suicide. Her husband was declared insane and was institutionalized until his death in 1941. Was it part of a curse?

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Posted by rhadika, 9:38 PM | 0 comments |

Minerals are crystals

By: D. Rhadika

The earliest forms of jewelry were items that early humans found naturally, such as shells or bits of bones. Early gravesites have also revealed that pre-historic man buried his dead with flowers and with carved ivory beads. These primitive beads would have taken at least an hour each to make.

Early man also might have found bits of turquoise that occurred naturally in areas of Turkey and North America. The pearlescent swirls found inside an abalone or conch would have also been used as jewelry.

They might have also found the earliest types of precious gems in the form of natural crystals, such as quartz or diamonds. Crystals are solid substances where the molecules are arranged in a symmetrical fashion, and they generally fall into one of six shapes:

Isometric, or cubic crystals are shaped like blocks and are symmetrically shaped. An example of an isometric crystal would be pyrite. This is also called fool’s gold because it has a metallic yellow or brassy color similar to gold.
Tetragonal, where the crystals are shaped like four-sided prisms and pyramids. An example of a tetragonal crystal is the zircon.
Hexagonal crystals are shaped like six-sided prisms, or pyramids. An example of this kind of crystal is the beryl, which includes gems like emeralds and aquamarines.
Orthorhombic crystals. An example of an orthorhombic crystal is topaz. Topaz can come in a variety of colors, although the mostly highly prized is a deep amber color. At one time, topaz was much more valuable, until rich veins of it were found in Brazil, which devalued the market.
Monoclinic crystals are short and stubby, with tilted faces at each end. Monoclinic crystals include gypsum.
Triclinic crystals are usually flat with sharp edges but no right angles. Each crystal has three unequal axes. An example of triclinic crystal is feldspar.

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Posted by rhadika, 9:37 PM | 0 comments |

Smithsonian Collection

By: D.Rhadika

Some of the world’s most spectacular diamonds and other gems are located in the National Gem Collection in the Museum of Natural History in Smithsonian Collection in Washington, D.C. In the collection are diamonds known to almost everyone, such as the Hope Diamond, as well as other large diamonds and other precious gems and jewelry.

In the National Gem Collection are examples of spectacular minerals and crystals, as well gemstones and jewelry. You can see a beautiful purple quartz amethyst crystal, or the mineral azurite, which is a bright blue copper compound mineral. You can also see a huge green beryl crystal. Beryls are the mineral family that include emeralds, aquamarines, heliodor and morganite. It’s almost as exciting to see the raw crystal as it is to see the finished product when it’s been cut and polished.

Some of the finished pieces in the Smithsonian Collection include the crown Napoleon used for the second Empress, Marie Louise. It originally was made of 700 carats in diamonds and 79 emeralds. The emeralds have been replaced with Persian turquoise cabochons.

You can also see the 182-carat Star of Bombay star sapphire that was given to Mary Pickford by Douglas Fairbanks and a brilliantly colored black opal. Black opals are the most valuable of the opal family of gems.

There are also extraordinary examples of quartz crystals, including a 7,000 faceted clear quartz egg! Part of the Smithsonian’s collection includes pieces of jade and turquoise used in other cultures. This includes a collection of Zuni Indian turquoise jewelry and jade lanterns carved from nephrite for the Chinese emperor Chi’en Lung in 1750. A more modern piece is the Dragon Vase, carved from a rare piece of lavender jade.

But of course, the most dazzling items in the collection are the individual gemstones and jewelry that have been owned by royalty through the centuries.

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Posted by rhadika, 9:34 PM | 0 comments |

Royalty diamonds

By: D.Rhadika


When did diamonds first become recognized as precious stones and used for jewelry? The earliest reference to them has been found in a Sanskrit document dated around 300 BCE. They were associated with the gods and were used to decorate religious icons and statues. In India, only kings, the highest caste, were allowed to own them.

Although diamonds were traded east and west of India, they were still prized in their natural crystal state, or polished to increase the shine and luster of them. The first guild of diamond cutters was established in 1375, and it was then that the practice of cutting the stones and faceting them was developed.

From the earliest times, diamonds were the province of kings and queens. In fact, in the 13th century, Louis IX of France decreed that only royalty could own diamonds, a dictate which faded away about 100 years later. By the late 15th century, they were used as wedding rings.

The largest diamond ever found was a 3106-carat diamond discovered in 1905 in a mine owned by Thomas Cullinan, for whom the stone was made. It was cut into smaller stones, the largest being made into the 530-carat Great Star of Africa diamond, cut by the Asscher Brothers, a famous diamond firm to this day. It’s also called the Cullinan I diamond, and is set in the Scepter of the Cross of the United Kingdom. A smaller stone cut from the Cullinan diamond is called the Lesser Star of Africa. It weighs 317 carats and is part of the Imperial State Crown. Both gems can be seen as part of the British Crown Jewels which are displayed in the Tower of London. The rest of the Cullinan diamond was cut into 11 smaller-weight stones and a number of fragments.

While the Cullinan diamond is the largest diamond ever found, there is a rumor that the man who discovered the diamond actually broke off part of the diamond before presenting it to the mine’s owner. This diamond, if the rumor is true, would have been 5,000 carats!

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Posted by rhadika, 9:33 PM | 0 comments |

Care of diamonds

By: D.Rhadika

Diamonds are durable and strong, but should be cared for as though they were fine breakable china or more fragile gems. They can chip or scratch if you’re not careful, and they can get quite dirty with oils from your skin and cosmetics, hair sprays or perfumes.

There are several ways to clean and store your diamonds. You can clean a diamond pretty quickly with a commercial jewelry cleaner that you either dip your jewelry in or soak them in a tub that gives it an ultrasound bath. Cold water and ammonia also work very well to dissolve oils that accumulate on your stones.

You can use a soft brush like an eyebrow brush to clean in between the prongs of the setting. Hold the diamonds by their settings and don’t touch the stones. If you’re cleaning them in the bathroom, be sure to close the stopper on the sink! You don’t want to go fishing in the plumbing for your valuable jewelry!

We’ve also used a mild toothpaste and soft toothbrush to clean gemstones. Rinse them under cold water, also using a soft brush to get any toothpaste particles from the gaps in between the stones and the setting. Some experts don’t recommend this and there is risk of scratching the stone, so if you choose this method, make sure it’s a low-abrasive. The best solution really is a commercial preparation or ammonia and water.

Rinse the jewelry in a tea infuser or under running water and dry it on a lint-free surface or towel. When you put your jewelry away, put it in a soft, velvet-lined box. Keep rings separate and don’t lump them in with all your other jewelry, to help protect the setting and the stones.

When you travel with your jewelry, make sure it’s in a soft, lined jewelry roll or a case specially designed for jewelry. Even if you wear your engagement and wedding rings all the time, take care of them. Don’t wear them if you’re using harsh cleaning chemicals or solutions or doing work that might cause them to knock against furniture or walls.

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Posted by rhadika, Tuesday, November 4, 2008 4:34 PM | 0 comments |

Certified diamond

By: D.Rhadika
Diamond certification is essential when you're buying a diamond and is different from a jeweler’s appraisal, although the certification is part of any appraisal. Many diamonds look the same, but not all of them are going to be of the quality you might like. Diamond certification is the written proof of a diamond's attributes. Without it, you have no assurance that the diamond you are buying is of the quality you're paying for. With it, you know the precise grading for each of the 4Cs – color, cut, clarity and carat weight, and, therefore, the diamond value.
Certification gives you the information you need to assess a diamond's value compared to other diamonds. It also allows you to make an intelligent comparison with other diamonds either in the same jewelry store or in another.
Diamond certificates are issued by independent gemological laboratories, not your jeweler. There are several grading laboratories, the most prominent being: the International Gemological Institute (IGI); the Gemological Institute of America (GIA); the American Gem Society (AGS); the European Gemological Laboratories (EGL) and GemEx Systems.
When you buy a diamond, be sure to question the sales associate first about the characteristics or attributes of the stone. Ask to see the diamond certification that will accompany the diamond when you purchase it. If you do some comparison shopping, you will note that the quality of the diamonds each jeweler carries varies depending on the store.
A diamond certification will also give you indicators about other diamond qualities, such as fire, brilliance and scintillation, also called Return of Light. These qualities refer to how light is refracted back to the viewer when held stationary or when in motion. The certification will also give you a measure of the stones fluorescence. These factors also impact the beauty and brilliance of your diamond.

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Posted by rhadika, 4:31 PM | 0 comments |

Clarity

By: D.Rhadika

Diamond clarity is one the 4Cs of diamond qualities. It refers to any flaws, or inclusions in the diamond, and how visible or detectable they are. Inclusions can be foreign substances, or minute cracks or flaws. It also refers to the appearance of any surface flaws or scratches. As with the color grading scales, clarity also has a grading scale, with FL used to denote a flawless diamond. What FL means is that there are no flaws or inclusions that can be seen when the stone is examined under 10X magnification, the standard for examining for flaws.

Other clarity designations are:

IF stands for internally flawless. This means there are no internal flaws or inclusions, although there may be small surface flaws.

VVS1 and VVS2 stand for Very Very Slight inclusions that are difficult to see under magnification. VS1 and VS2 indicate Very Slight inclusions that can be seen under magnification but are invisible to the naked eye.

SI1 and SI2 denote Slight Inclusions that may or may not be visible to the naked eye.

I1, I2 and I3 are "imperfect", with inclusions clearly visible to the naked eye. For I3, the inclusions impact the brilliance of the diamond and are large and obvious.

In most cases, there is nothing that can be done about flaws or inclusions, although in recent years lasers have been used to enhance some inclusions or fractures in diamonds by filling them in, much the way small dings in a windshield are filled in.

Certainly the most highly valued diamonds are those that are flawless – FL - or internally flawless – IF. But excellent values can be obtained at the VVS and VS grades, as these are flaws not visible to the naked eye, but only to an experienced grader under magnification.

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Posted by rhadika, 4:29 PM | 0 comments |