Gemological Institute of America
Established in 1931, the Gemological Institute of America is the world’s foremost authority
on diamonds, colored stones, and pearls.
GIA exists to protect all purchasers of gemstones, by providing the education, laboratory
services, research, and instruments needed to accurately and objectively determine gemstone
quality.
GIA is the world’s most respected gemological laboratory, entrusted with grading and identifying
more gems than any other lab including the Hope, the Taylor-Burton, the De Beers Millennium Star,
and the Incomparable. Located in major gem and jewelry centers around the world, GIA laboratories
are staffed by expert diamond graders and gemologists, whose work sets the standard for grading
practices worldwide.