Gemological Institute of America (GIA)

The world’s foremost authority on diamonds, colored stones, and pearls.

A nonprofit institute, GIA exists to protect all purchasers of gemstones by providing the education and resources needed to accurately and objectively determine gemstone quality. GIA's mission is to ensure the public trust in gems and jewelry by upholding the highest standards of integrity, academics, science, and professionalism.

GIA carries out its mission in several important areas. It is an international leader in academic studies for Gemologist and Jeweler Programs. As a research center, GIA is a place of breakthrough discoveries and home to sophisticated technologies used to analyze thousands of samples each year. Most important, GIA is the world’s most respected gemological laboratory, a place to turn for unbiased analysis of gemstone quality.

LEARN MORE about GIA and its programs.