【Carlsbad, Ca】GIA to Offer Origin Determination for 3 More Gemstones
Editor’s NoteThe Gemological Institute of America (GIA) will expand its origin-determination services to include opal, peridot, and demantoid garnet…
gemstone reports
【USA】GIA Renews Its Colored Gemstone Reports and Expands Origin Determination Services in 2026
Editor’s NoteThe Gemological Institute of America (GIA) will introduce updated colored gemstone reports and expand its origin determination services…
【Carlsbad, Ca】GIA’s New ‘Quality Assessment’ for Lab-Grown Diamonds Is Coming
Editor’s NoteStarting October 1, GIA will implement a new assessment system for lab-grown diamonds, introducing “premium” or “standard” designations….