Opal Stone
Black blue opal (a black opal with blue body color). Photo © Joel E. Arem, PhD, FGA. Used with permission.
Article: Appraising Opals
Credit: Joel E. Arem, PhD, FGA
Gemstone | Opal Stone |
Natural or man made | Natural |
Gem State | Other |
Color | Blue |
Transparency | Opaque |
Photo phenomena | Play of Color |