Natural Rarest
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68.00 CT.HUGE NATURAL RAREST TOP QUALITY BLACK ONYX GEMSTONE CABOCHON PEAR LOT 3 $13.99 |
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58.00 CT.HUGE NATURAL RAREST TOP QUALITY BLACK ONYX GEMSTONE CABOCHON OVAL LOT 3 $12.99 |
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36.00 CT.NATURAL RAREST AMAZING STRIPED AGATE GEMSTONE CABOCHON $7.25 |
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35.80 CT.NATURAL RAREST DESIGNER TIGER EYE GEMSTONE CABOCHON $5.65 |
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24.60 CT.NATURAL RAREST DESIGNER PICTURE JASPER GEMSTONE CABOCHON $5.10 |
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12.80 CT.NATURAL RAREST DESIGNER BLUE LACE AGATE GEMSTONE CABOCHON $5.60 |
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12.80 CT.NATURAL RAREST BEAUTIFUL ABALONE SHELL GEMSTONE CABOCHON $5.10 |
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30.45 CT.NATURAL RAREST BEAUTIFUL CARNELIAN GEMSTONE CABOCHON $6.60 |
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63.00 CT.NATURAL RAREST BEAUTIFUL MALACHITE GEMSTONE CABOCHON $8.80 |
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28.20 CT.RARE NATURAL RAREST FINE QUALITY BLUE SODALITE GEMSTONE CABOCHON PEAR $5.30 |
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31.00 CT.NATURAL RAREST SODALITE GEMSTONE CABOCHON $6.36 |
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35.30 CT.HUGE NATURAL RAREST FINE QUALITY RED CARNELIAN GEMSTONE CABOCHON OVAL $5.82 |
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20.40 CT.HUGE NATURAL RAREST BEST QUALITY GREEN ONYX GEMSTONE CABOCHON OVAL $5.27 |
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48.00 CT.HUGE NATURAL RAREST BEST QUALITY BLUE ONYX GEMSTONE CABOCHON OVAL $6.25 |
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23.90 CT.NATURAL RAREST UNAKITE GEMSTONE CABOCHON $6.10 |
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18.00 CT.NATURAL RAREST FANTASTIC GOLD STONE GEMSTONE CABOCHON $5.21 |
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24.60 CT.NATURAL RAREST BEAUTIFUL LAPIS GEMSTONE CABOCHON $5.35 |
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58.20 CT.HUGE NATURAL RAREST SUPER QUALITY BLUE ONYX GEMSTONE CABOCHON ROUND $8.62 |
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21.00 CT.NATURAL RAREST BEAUTIFUL TIGER EYE GEMSTONE CABOCHON $5.15 |
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60.90 CT.HUGE NATURAL RAREST FINE QUALITY BLUE ONYX GEMSTONE CABOCHON OVAL $9.85 |
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39.75 CT.HUGE NATURAL RAREST BEST QUALITY BLUE ONYX GEMSTONE CABOCHON OVAL $7.20 |
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89.00 CT.HUGE NATURAL RAREST HIGH QUALITY BLUE ONYX GEMSTONE CABOCHON OVAL LOT 3 $12.99 |
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39.20 CT.NATURAL RAREST BEAUTIFUL BLUE LACE AGATE GEMSTONE CABOCHON $7.41 |
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26.30 CT.NATURAL RAREST BEAUTIFUL DALMENTION GEMSTONE CABOCHON $5.60 |
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0.40Ct RAREST STUNNING NATURAL FANCY BROWN DIAMOND $9.99 |
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0.30Ct RAREST STUNNING NATURAL FANCY BROWN DIAMOND $9.99 |
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14.00 CT.NATURAL RAREST GENUINE BLACK RUTILE GEMSTONE CABOCHON $8.65 |
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20.70 CT.NATURAL RAREST FANTASTIC BLACK RUTILE GEMSTONE CABOCHON $9.99 |
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76.20 CT.RARE NATURAL RAREST DESIGNER BLOOD AGATE GEMSTONE CABOCHON ASSORTED P 4 $13.99 |
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26.20 CT.NATURAL RAREST BEAUTIFUL YELLOW LACE AGATE GEMSTONE CABOCHON $5.75 |
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26.00 CT.NATURAL RAREST BEAUTIFUL SPIDER WEB JASPER GEMSTONE CABOCHON $5.75 |
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16.00 CT.NATURAL RAREST BEAUTIFUL CRYSTAL GEMSTONE CABOCHON $6.39 |
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70X10 CT.NATURAL RAREST AMAZING BOTSWANA AGATE GEMSTONE CABOCHON LOT 7 PC $18.99 |
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37.70 CT.NATURAL RAREST FANTASTIC GREEN MOSS AGATE GEMSTONE CABOCHON $8.70 |
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1.97Ct RAREST NATURAL GREEN RUSSIAN CHROME DIOPSIDE $9.99 |
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39.90 CT.NATURAL RAREST FANTASTIC RUBY ZOISITE GEMSTONE CABOCHON $9.90 |
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30.00 CT.NATURAL RAREST FANTASTIC BLACK RUTILE GEMSTONE CABOCHON $13.99 |
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49.00 CT.NATURAL RAREST BEAUTIFUL CITRINE GEMSTONE CABOCHON LOT 13 PC.. $13.99 |
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20.80 CT.NATURAL RAREST AMAZING ABALONE SHELL GEMSTONE CABOCHON $5.65 |
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19.80 CT.NATURAL RAREST BEAUTIFUL TURTELLA GEMSTONE CABOCHON $4.35 |
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32.20 CT.NATURAL RAREST BEAUTIFUL TURQUOISE GEMSTONE CABOCHON $12.99 |
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35.20 CT.NATURAL RAREST DESIGNER GREEN MOSS AGATE GEMSTONE CABOCHON $8.35 |
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4.32Ct WORLD RAREST STUNNING LUSTER TOP FIRE NATURAL GREEN OLIGOCLASE $9.99 |
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0.83ct Unusual Rarest 100%Natural Unseen NoHEAT Collection Pinkish White Diamond $0.99 |
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0.47 ct~HUGE AMAZING RAREST NATURAL ROUND AAA BEST VIVID BLUE DIAMOND $9.99 |
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2.32cts Mind Boggling Rarest 100%Natural Top Quality Awesome Best Blue Tanzanite $0.99 |
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0.26 ct~AMAZING RAREST NATURAL ROUND AAA BEST VIVID BLUE DIAMOND $9.99 |
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1.97cts Mind Boggling Rarest “UNHEAT” AAA D’Block Natural Purple Blue Tanzanite $0.99 |
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1.17cts Unusual Rarest 100%Natural NOHEAT NOTREAT Best Fancy Brown Diamond $0.99 |
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2.00cts Flawless Rarest 100%Natural Top Fire Beautiful AAA Best Blue Tanzanite $0.99 |
Natural diamonds colored diamonds are among the rarest and most beautiful you could imagine. Mined in a number of varieties worldwide, including including South Africa and Australia, colored diamonds are prized by collectors and are sold for 10 thousand dollars per carat.
Colored diamonds are increasing in popularity and, as such, more and more buyers looking to invest in colored diamonds. However, there are some points to consider when researching and buying diamonds color.
First and foremost, a buyer needs to know if the color on the diamond is natural or improved. This should not be confused with the fact that diamond is a diamond natural or synthetic diamonds, but where the diamond color actually comes from. What do we mean by this?
A diamond with a natural color for example yellow or blue, is the result of chemical impurities in the diamond (boron nitrogen for yellow, blue) that were incorporated as the diamond grew in the mantle land. The color is intrinsic to the diamond, he is the color it always was.
As natural colored diamonds are so rare, so expensive and now so popular a variety of laboratory techniques have been developed to alter, induce and enhance the natural color of a diamond. These laboratory techniques can artificially increase the value of a diamond and, despite the diamond traders being legislated by government authorities to report any laboratory treatments to clients, this not always the case. An unscrupulous dealer may sell a yellow diamond laboratory treated as a natural yellow diamond and receive the highest purchase price from unsuspecting customers.
So, what are the treatments of laboratory and improvements should be considered? Irradiation of diamonds and High pressure – high temperature (HPHT) treatments are among the most common processes that diamonds can be, to improve the color and improve perceptions value.
By subjecting the brown diamonds with HPHT treatment, the color of the diamond can be changed to a more desirable color of yellow or green. Diamonds light brown or gray color diamonds can convert almost colorless immediately improve its perceived value according to the DZ color diamond scale. HPHT treatments are traditionally permanent, which means that the diamond color does not return to its original color and natural.
Irradiation of diamonds in a natural setting (as Earth's crust or mantle) leads to a very rare green diamonds. Similarly, by irradiating a diamond in a laboratory, a diamond can produce green or blue-green and to further treatment, even stones orange or pink. Many black diamonds are also the result of laboratory irradiation.
It's easy identify whether a diamond is natural or synthetic (laboratory-grown), but is more difficult to identify if the color of a diamond is natural or induced by the laboratory. certification laboratories, such as the GIA have the necessary equipment to investigate the color of diamonds and diamond questionable should be submitted to the GIA for Research and the appropriate certification.
If you are in the colored diamond market, be aware of the laboratory treatments and make sure your dealer knows the origin of color, origin of diamonds and also providing the necessary certification for the stones they are buying.
About the Author:
Clare Appleyard is co-owner and the resident Technical Diamond Specialist with Katannuta, a company specializing in the manufacture of bespoke jewellery and the supply of quality diamonds and gemstones. Having completed a Masters Degree in Geology at the University of Cape Town, South Africa, Clare spent 6 years working for the world’s leading diamond producer before moving to the retail diamond and jewellery market with the formation of Katannuta.
Article Source: ArticlesBase.com – Is your colored diamond natural or laboratory treated?