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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.
GCI Gemological Laboratories & College's main headquarters is in the Israel Diamond Exchange in Ramat Gan. [2] The GCI has regional labs and educational centers equipped with local and Israeli staff in Russia and, since June 2006, in India—a disposition of four branches in Mumbai, Delhi, Hyderabad and Kolkata.
The American Gem Society (AGS) is a trade association of retail jewelers, independent appraisers, suppliers, and selective industry members, which was founded in 1934 by Robert M. Shipley. The Society is based in Las Vegas, Nevada , along with the affiliated American Gem Society Laboratories (AGSL) (founded in 1996) and the American Gem Society ...
In March 2007, IGI collaborated with the Tanzanite Foundation to help distribute jewelry certificates using a grading scale called the Tanzanite Quality Scale (TQS), for the gem called Tanzanite, which was discovered in Tanzania in the 1960s. [3] [4]
His objective throughout instrument development at GIA was to provide jewelers with practical tools that could help them in the day-to-day operation of identifying gemstones. By the 1970s, the GIA Gem Trade Laboratory staff was examining large numbers of gemstones, including the grading of diamonds and the identification of colored stones and ...
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The standard method for specifying the weight is to use |weight={{convert|x.xx|carat|g}}.To have the weight automatically converted, use |carats=x.xx or |grams=x.xx.If both carats and grams are specified, the template will ignore the measurement in grams, and convert the weight from the value specified in carats.
ImaGem Inc. is a gem information company based on patented technology for grading and identifying gems. The parent company, ImageStatistics, offers applications in imaging and image processing for the medical, pharmaceutical, manufacturing, chemical and quality assurance industries.