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The Gemological Institute of America (GIA) is a nonprofit institute based in Carlsbad, California. It is dedicated to research and education in the field of gemology and the jewelry arts. [1] Founded in 1931, GIA's mission is to protect buyers and sellers of gemstones by setting and maintaining the standards used to evaluate gemstone quality.
Gemologist, Chairman of Board of Governors of Gemological Institute of America Richard T. Liddicoat, Jr. (March 2, 1918 – July 23, 2002) was an American gemologist . An educator in gemology, he contributed in the area of diamond quality grading and gem identification.
Gems & Gemology is a quarterly scientific journal published by the Gemological Institute of America. Each issue is devoted to research on diamonds, gemstones, and pearls. Topics include geographic sources, imitations and synthetics, treatments, and identification techniques.
The clarity grading system developed by the GIA has been used throughout the industry as well as by other diamond grading agencies including the American Gemological Society (AGS), and the International Gemological Institute (IGI). There are other smaller labs which use the GIA system as well.
A report (1132411262) dated 9 May 2011 from the Gemological Institute of America states that the diamond is D colour, VS1 clarity; accompanied by a diagram indicating that the clarity may be potentially internally flawless.
As a result of the recut, which removed some chips and reduced the size of the culet by 40%, the gem has been re-evaluated by the Gemological Institute of America and its colour grade revised from "fancy deep grayish-blue", the same grade given by GIA to The Hope, to the more desirable "fancy deep blue". The diamond's clarity had also been ...
Gemological Institute of America (GIA) was the first laboratory in America to issue modern diamond reports, [31] and is held in high regard amongst gemologists for its consistent, conservative grading. Diamond High Council (HRD) Official certification laboratory of the Belgian diamond industry, located in Antwerp. [32]
Graff adheres to the Kimberley Process, never knowingly buying or trading rough diamonds from areas where this would encourage conflict or human suffering. [9] The majority of Graff diamonds are laser engraved with unique Gemological Institute of America (GIA) tracking numbers, which whilst invisible to the naked eye, allow for their origin to be traced. [10]