Opal triplet: Australian rough, ceramic base, and quartz top (30 x 23 mm). Photo © Joel E. Arem, PhD, FGA. Used with permission.
Assembled Opaque Blue Play-of-Color Opal Stone Cabochon from Australia
Opal triplet: Australian rough, ceramic base, and quartz top (30 x 23 mm). 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 | Assembled |
| Origin | Australia |
| Height | 30 |
| Width | 23 |
| Gem State | Cabochon |
| Color | Blue |
| Transparency | Opaque |
| Photo phenomena | Play of Color |