Can we just take a minute here to appreciate opals? From top left: Boulder opal. Ethiopian opal. Bla
Can we just take a minute here to appreciate opals? From top left: Boulder opal. Ethiopian opal. Black crystal opal (considered the “Holy grail" of opals). Andamooka matrix opal. Yowah nut opal. Mexican fire opal. Mezezo opal. White harlequin opal. Panel boulder black opal. -- source link