black opal
Black opal exhibits a play-of-color effect on ground colors such as black, deep blue, and gray.
It is the most valuable type of opal.
Each gemstone is unique because each piece has a different play of color and appearance.
Opal is the birthstone for October.
Karatz GemMagazine
" Black Opal "
Karatz GemMagazine
" Black Opal "