Precious Opal (Var: Black Opal)

Specimen ID: WRV-222

Mineral(s)
Precious Opal (Var: Black Opal) : SiO2·nH2O
Locality
Mindat locality:
Events

Photo added to mindat.org

This type of precious opal is called semy black and was found at the 17 miles field at Andamooka. The size of this opal is 14x12mm. Photo, John Nijhuis.
John Nijhuis - 21st December 2005
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