Black Opal, Australia, position #2, (stone in ring approximately 10 cts). Photo © Joel E. Arem, PhD, FGA. Used with permission.
Opaque Black Play-of-Color Black Opal, 10 ct Cabochon in Ring from Australia
Black Opal, Australia, position #2, (stone in ring approximately 10 cts). Photo © Joel E. Arem, PhD, FGA. Used with permission.
Article: Opal Stones and Gems: Value, Price, and Jewelry Information
Credit: Joel E. Arem
| Gemstone | Opal Stone, Black Opal, Precious Opal |
| Natural or man made | Natural |
| Origin | Australia |
| Carat Weight | <i class="fa fa-square-o facet-search-color-swatch" style="color:#FFFFFF;-webkit-text-stroke-width:1px;-webkit-text-stroke-color:black;"></i> Colorless |
| Jewelry type | Ring |
| Gem State | Cabochon |
| Color | Black |
| Transparency | Opaque |
| Photo phenomena | Play of Color |