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| Ilvaite |
I saw the quartz crystals during my first look at this specimen. I am so uninitiated to mineral identification that I thought they were Ilvaite and just discovered, to the contrary that the black crystals on the left are Ilvaite. I am afraid that this series of photographs was photographed displaying my erroneous idea. My composition shows it.
In this image it is in the upper left.
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| Ilvaite |
Ilvaite is a sorosilicate of iron and calcium with formula: CaFe2+2Fe3+Si2O7O(OH). Wikipedia
This sample comes to us from Dalnegorsk, Russia.
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