The GIA Difference - GIA.edu
https://www.gia.edu/gia-about
WEBEstablished in 1931, the Gemological Institute of America (GIA) is the world’s foremost authority on diamonds, colored stones, and pearls. A public benefit, nonprofit institute, GIA is the leading source of knowledge, standards, and education in gems and jewelry.
DA: 11 PA: 18 MOZ Rank: 81