Many translated example sentences containing "green diamond" – German-English dictionary and search engine for German translations. Leibish & Co. specializes in Natural Fancy Grün Diamonds & Grün Diamond 1,51 Karat, Fancy Intense Yellowish Green, Radiant Form, VS1 Reinheit, GIA. Große Auswahl an Green Diamond Produkten ✚ Bis zu 3 Jahre Garantie mit kostenloser Kundenkarte möglich ➤ Ihr Technik Experte.
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The Chopard Chameleon , a This stone was actually one of the first stones reported by the GIA as a chameleon back in the late s by a Mr.
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Browse through our wide selection of Natural Fancy Green Diamonds. Leibish Diamond Education Center. The Color Green color diamonds are among the rarest of the color diamond family.
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Find Out More. Michael Fried. Diamonds that owe their green color to a treatment should always be sold with a disclosure that the color was produced by treatment, and state the method of treatment.
Because so many buyers prefer diamonds with a natural color, green diamonds colored by treatment generally sell for a significantly lower price than natural green diamonds of similar color, size and quality.
A Synthetic Diamond Treated to Produce a Fancy Deep Blue-Green Color: The blue-green synthetic diamond above had an "as-grown" Fancy Intense orange-yellow color, then post-growth irradiation and annealing treatments transformed it into a Fancy Deep blue-green color.
This synthetic diamond was produced by D. NEA Diamonds. Synthetic diamond crystals have been successfully grown in laboratories in a variety of colors.
Synthetic diamonds with a light green color and a greenish yellow color have been produced when small amounts of nitrogen and boron were incorporated into the diamond.
Green synthetic diamonds have also been produced by irradiating colorless or yellow synthetic diamonds. Because many green diamonds obtain their color from exposure to radiation in a laboratory a process known as irradiation , there have been concerns about their safety when used in jewelry.
All companies in the United States that apply radiation treatments to any type of gemstone must be licensed by the Nuclear Regulatory Commission.
These companies must use approved methods to treat the gemstones, then store them in a secure facility until their radioactivity declines below a level that would make them safe for use in jewelry.
Only then can they be released for jewelry manufacturing or sale to the public. The process of gemstone irradiation is very common.
Almost all of the blue topaz offered in stores today is colorless topaz that has been irradiated and then heated to produce a blue color.
Gemstones have been treated by irradiation in the United States for decades with the Nuclear Regulatory Commission actively licensing companies who do the treatments.
Based upon their experience the NRC reports:. The "Aurora Green" Diamond: This ring, holding the 5. It holds two important distinctions: A the highest price ever paid for a green diamond at auction; B the largest natural-color, Fancy Vivid green diamond ever graded by the Gemological Institute of America.
Photo by Christie's. Two of the most famous and valuable natural-color green diamonds are the "Aurora Green" and the "Dresden Green.
In , a ring containing the Aurora Green, a 5. That was the highest price ever paid for a green diamond at public auction.
Prior to the auction, gemologists at the Gemological Institute of America graded the Aurora Green and reported that it was the largest Fancy Vivid green diamond with a natural color that they had ever graded as of January 20, It is a faceted gem of 41 carats with a uniform green color.
Some diamond experts believe that it was cut from a rough diamond produced at the Kollur Mine in the Indian State of Andhra Pradesh.