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Gemological Institute of America

The Gemological Institute of America is one of several institutions catering the to the gemstone community. Along with the other entities such as the American Gem Laboratories? and the International Gemological Institute?, the GIA regularly provides identification, grading, and certification of higher value gemstones, and has established one of two accepted scales commonly used in the evaluation of a gemstones clarity. They are also responsible for establishing the concept of the 4 C's, when establishing a gemstones value.

The GIA was established in 1931 by Robert Shipley in Los Angeles, California, though they have since relocated to Carlsbad, California, just north of San Diego.

The GIA does far more than just grade gemstones; in fact the GIA has been deeply involved in establishing technology and processes in identifying synthetic and treated gemstones.


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