Opal Stone
Opal gems synthesized through a process created by Pierre Gilson appear very natural. Gilson opals: cabochons from 3 to 6 cts. Photo © Joel E. Arem, PhD, FGA. Used with permission.
Article: Opal Stones and Gems: Value, Price, and Jewelry Information
Credit: Joel E. Arem, PhD, FGA
Gemstone | Opal Stone |
Natural or man made | Lab-made |
Gem State | Cabochon |
Color | RedWhite, Brown, |
Transparency | Opaque |