Established in 1931, GIA is theworld’s foremost authority on diamonds, colored stones, and pearls. GIA existsto protect all purchasers of gemstones, by providing the education, laboratoryservices, research and instruments needed to accurately and objectivelydetermine gemstone quality. As creator of the 4Cs and the GIA InternationalDiamond Grading System™, the Institute sets and maintains the standard forgrading and identification practices used worldwide. GIA’s corporateheadquarters are located in the United Statesin Carlsbad, California.
As the world’s most respectedgemological laboratory, GIA is entrusted with grading and identifying moregems than any other lab, including famous diamonds like the Hope, theTaylor-Burton, the De Beers Millennium Star, and the Incomparable. Locatedin major gem and jewelry centers around the world, GIA laboratories are staffedby expert diamond graders and gemologists, whose work sets the standard forgrading practices worldwide.