Established in 1931, GIA is a nonprofit organization that promotes a deeper understanding of gemstones in the trade and the public through education, research, laboratory services and instrument development.

GIA standardized the evaluation of diamonds through creating the 4Cs of diamond quality (Color, Cut, Clarity, Carat Weight) and the GIA International Diamond Grading System™, which is recognized globally as the standard for diamond quality. The Institute is dedicated to ensuring the public trust in gems and jewelry by upholding the highest standards of integrity, academics, science and professionalism.