Most specimens from Andamooka have a white body color prior to treatment. This one has a region of dark body color, which shows the play of color more readily. "Precious opal (Andamooka Opal Fields, South Australia) 6," photo by James St. John. Licensed under CC By 2.0.
Article: Opal Treatments: How to Detect Treated Opals
Credit: James St. John
|Natural or man made||Natural|
|Origin details||Andamooka Opal Fields, South Australia|
|Photo phenomena||Play of Color|