“Image of Black Coral,” by Tsai ming lun is licensed under CC By-SA 3.0
Opaque Black Coral Rough
Black coral. Photo by Tsai ming lun. Licensed under CC By-SA 3.0.
Article: Coral Value, Price, and Jewelry Information
Credit: Tsai ming lun
| Gemstone | Coral |
| Natural or man made | Natural |
| Gem State | Rough |
| Color | Black |
| Transparency | Opaque |