This gray opal shows a wide range of hues in its play of color. Precious opal (Bulldog Shale, Lower Cretaceous; Coober Pedy Opal Field, South Australia), photo by James St. John. Licensed under CC By 2.0.
Translucent Gray Play-of-Color Opal Stone Tumbled from Australia
This gray opal shows a wide range of hues in its play of color. Precious opal (Bulldog Shale, Lower Cretaceous; Coober Pedy Opal Field, South Australia), photo by James St. John. Licensed under CC By 2.0.
Article: Eight Opal Types Explained
Credit: James St. John
| Gemstone | Opal Stone |
| Natural or man made | Natural |
| Origin | Australia |
| Origin details | Coober Pedy Opal Field, South Australia |
| Gem State | Tumbled |
| Color | Gray |
| Transparency | Translucent |
| Photo phenomena | Play of Color |