Gemological Institute of America

GIA is the world’s foremost authority on diamonds, coloured 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 not privately owned or publicly traded. Its profits are reinvested in ongoing education and research efforts. The sheer size of GIA’s worldwide operations ensures that GIA is the first to see any new gem material entering the pipeline. GIA researchers are often the first to detect and identify new treatments and synthetics. These findings are applied to the testing and detection methods GIA uses in its laboratories, and inform the content of the courses GIA teaches.