New from Gemological Institute of America, Inc.

Established in 1931, GIA is the world’s foremost authority on diamonds, colored stones, and pearls. A public benefit, nonprofit institute, GIA is the leading source of knowledge, standards, and education in gems and jewelry. In the 1940’s, GIA established the “4C’s” and the International Diamond Grading System – to this day, the worldwide standard for evaluating diamond quality.

For more information on GIA, their educational programs, gemological research, or to learn how GIA strives to protect the gem and jewelry buying public by setting global quality standards, visit


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