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The first GIA gemological laboratory was established in Los Angeles in 1931. Shortly thereafter, the institute introduced the "Certified Gemologist" professional designation. [4] In 2005, an allegation of bribery was made against GIA lab workers, casting doubt on the integrity of diamond grading labs.
Richard T. Liddicoat. 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. Liddicoat was the Chairman of the Board of Governors at the Gemological Institute of America (GIA).
The first gemological laboratory serving the jewelry trade was established in London in 1925, prompted by the influx of the newly developed "cultured pearl" and advances in the synthesis of rubies and sapphires. [4]
A common misconception about lab-grown diamonds is that they aren’t “real,” despite the Gemological Institute of America (GIA) formally declaring that they are.
Gemstone. Group of precious and semiprecious stones—both uncut and faceted—including ( clockwise from top left) diamond, uncut synthetic sapphire, ruby, uncut emerald, and amethyst crystal cluster. A gemstone (also called a fine gem, jewel, precious stone, semiprecious stone, or simply gem) is a piece of mineral crystal which, when cut or ...
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.
International Gemological Institute (IGI) is a Belgian diamond, colored stone and jewelry certification organization. Established in 1975, it is the largest independent gemological laboratory worldwide. [1]
The majority of mined diamonds fall between white and pale yellow or brown; what is known as the normal color range. Diamonds of more intense color (usually yellow, but in some cases red, green or blue) are termed fancy color diamonds. Black diamonds are also fancy color diamonds.
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