Layered boulder opal, about 3 cm in width. Photo by Dietmar Down Under. Licensed under CC By 2.0.
Translucent Blue Play-of-Color Opal Stone Rough
Layered boulder opal, about 3 cm in width. Photo by Dietmar Down Under. Licensed under CC By 2.0.
Article: Opal Stones and Gems: Value, Price, and Jewelry Information
Credit: Dietmar Down Under
| Gemstone | Opal Stone |
| Natural or man made | Natural |
| Gem State | Rough |
| Color | Blue |
| Transparency | Translucent |
| Photo phenomena | Play of Color |