GIA (Gemological Institute of America Inc.)
Established in 1931, GIA protects the public through gemological research, education, impartial gem identification and grading services, and instrument development. The world's foremost authority in gemology, GIA sets the standard for determining the qualities of diamonds, colored stones, gems, and pearls. As an independent nonprofit organization, GIA's activities are governed by its mission to serve the public. Visit GIA.edu