Black Opal
Semi-black opal: Australia (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, PhD, FGA
Gemstone | Black Opal, Opal Stone, Precious Opal |
Natural or man made | Natural |
Origin | Australia |
Gem State | Cabochon |
Color | Black |
Transparency | Opaque |
Photo phenomena | Play of Color |