Robert M. Shipley established the Gemological Institute of America (GIA) in 1931 and opened the first U.S. gemological laboratory in Los Angeles. GIA is an independent, public benefit, non-profit institute that is the leading source of knowledge, standards and education in diamonds, gems and jewellery. The GIA strives to protect the gem and jewellery buying public by setting global quality standards.
GIA tests every material submitted to determine whether it is natural or not, and discloses any known treatments discovered during analysis.
As the world’s foremost authority on diamonds, GIA researchers have made many innovative contributions to the understanding of diamonds. In the 1940s, GIA established the 4Cs (Cut, Colour, Clarity and Carat Weight) and the International Diamond Grading System. To this day, it is the worldwide standard for evaluating diamond quality.
GIA has been entrusted with grading some of the world’s most famous diamonds, including the Hope (45.52 carats), the Steinmetz Pink (59.60 carats), the Taylor-Burton (69.42 carats), the Allnatt (101.29 carats), the De Beers Millennium Star (203.04 carats), the Centenary (273.85 carats), and the Incomparable (407.48 carats).
GIA Headquarters - The Robert Mouawad Campus