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Dennis Armbruster's Gallery

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Calcite : CaCO3

Amboy Crater, San Bernardino Co., California, USA

Here is a photo of just one of the smaller pieces of what I believe is pseudomorphed calcite scalenohedrons in a star pattern with a nice butterfly twin. I'm not sure what mineral replaced the calcite but it seems to be almost completely black. Many specimens have very small quartz crystals jutting out from them and are covered by druzy ...
Photo ID: 158976    View Count: 44
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