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Opal (Var: Precious Opal)


Opal (Var: Precious Opal) : SiO2·nH2O

Photo Copyright © 2000-2001 by John H. Betts. All Rights Reserved.
This photo, and many others, have been provided by John Betts Fine Minerals - http://www.johnbetts-fineminerals.com - For more fine minerals click here.  - This image is copyrighted. Unauthorized reproduction prohibited.
Locality: White Cliffs, Yungnulgra Co., New South Wales, Australia
Part of a fossilized bone, with a hollow in the center where the marrow was, now completely replaced by transparent opal. The fire (play of colors) is bright and the opal is very transparent allowing visibility deep inside. Total weight = 21.57 carats. Overall size of mineral specimen: 25x14x12 mm. Size of individual crystals: 1-2 mm.

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