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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.
Sri Lanka, geologically speaking is an extremely old country. Ninety percent of the rocks of the island are of Precambrian age, 560 million to 2,400 million years ago. The gems form in sedimentary residual gem deposits, eluvial deposits, metamorphic deposits, skarn and calcium-rich rocks. Nearly all the gem formations in Sri Lanka are located ...
Gemstones have no universally accepted grading system. Diamonds are graded using a system developed by the Gemological Institute of America (GIA) in the early 1950s. Historically, all gemstones were graded using the naked eye. The GIA system included a major innovation: the introduction of 10x magnification as the standard for grading clarity.
For the next few years he worked to promote the need for gemological education and train a new breed of "certified" jewelers. These jewelers would form the foundation of the Gemological Institute of America (GIA), [1] and later the AGS. In its history, the AGS has achieved significant accomplishments within the field of gemology and jewelry.
Gemological Institute of America (GIA) was the first laboratory in America to issue modern diamond reports, [33] 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. [34]
American Gem Society (AGS), also known as American Gemological Society – American trade association; American Geosciences Institute (AGI) – Nonprofit scientific federation including around 50 geoscientific organizations founded in 1948; American Geophysical Union (AGU) – Nonprofit organization of geophysicists
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.
International Gemological Institute (IGI) is a gemological organization which certifies diamond, colored stone and jewelry. It was established in 1975 in Belgium. [1] On May 21, 2023, Blackstone Group announced their acquisition of IGI. [2]