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Quartz : SiO2, Chalcedony (Var: Agate) : SiO2

Copyright © Karl Volkman 2/24/08
 
 
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Quartz : SiO2, Chalcedony (Var: Agate) : SiO2

Copyright © Karl Volkman 2/24/08  - This image is copyrighted. Unauthorized reproduction prohibited.

A 7.8cm quartz nodule with unknown green "moss" rind, blue agate shell, and white agate layers showing the orientation of the nodule as the agate deposited. Photographed by Karl Volkman. Collected by and in the collection of Donald Volkman

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Photo added: 24th Feb 2008