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Opal


Opal : SiO2·nH2O

Photo Copyright © Karl Volkman 12/07  - This image is copyrighted. Unauthorized reproduction prohibited.
Locality: Andamooka opal fields, Andamooka Ranges - Lake Torrens area, South Australia, Australia
A 2.8cm wide opal pseudomorph after gastropod(snail), with flashes of pale blue fire. Photographed by and in the collection of Karl Volkman.

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