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Through its library and subject experts, GIA acts as a resource of gem and jewelry information for the trade, the public and media outlets. [2] In 1953 the GIA developed its International Diamond Grading System and the "four Cs" (cut, clarity, color, and carat weight) as a standard to compare and evaluate the quality of diamonds. [2]
International Gemological Institute (IGI) is a gemological organization which certifies diamond, colored stone and jewelry. It was established in 1975 in Belgium. It was established in 1975 in Belgium.
The stone was cut by a team of 35 using computer-controlled lasers into 26 D-flawless diamonds totaling 223.35 carats (44.670 g), the highest yield from a single diamond. [ 17 ] [ 18 ] The Wittelsbach-Graff Diamond is a 31.06-carat (6.212 g) fancy deep-blue diamond with internally flawless clarity purchased by Laurence Graff in 2008 for £16.4 ...
Lazare Kaplan International Inc. (LKI) is a diamond manufacturing and distribution company based in New York City. The Chairman of the Board of Directors is Maurice Tempelsman . The first LKI was located in Ponce, Puerto Rico , at el Barrio de los Diamantes , a community named after the factory was located there.
Institute of Diamonds. The International Institute of Diamond Grading & Research (IIDGR) was set up by De Beers in 2008, with the aim of providing a range of services and equipment in the field of diamond verification. It is based in London, Antwerp and, from 2015, in Surat, India.
Shane Company or Shane Co. is the largest privately owned jeweler in the United States. [1] The company is a direct diamond, ruby, and sapphire importer that operates 20 retail stores across the US, as well as their website, ShaneCo.com.
The World Diamond Council is an organization representing the entire diamond value chain including representatives from diamond mining, manufacturing, trading and retail. The council was established in July 2000. The purpose was to create a system to keep the supply chain of diamonds as free as possible from conflict diamonds. [1] [2] [3] [4]
GSI participates in trade organizations including the Jewelers Security Alliance, Jewelers Vigilance Committee, Responsible Jewellery Council (RJC), Dubai Multi Commodities Centre (DMCC), Israel Diamond Exchange (IDE), Jewelers for Children (JFC), Women’s Jewelry Association, Bharat Diamond Bourse, Antwerp Diamond Club and more.
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