|AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Illinois > Calcite on Sphalerite with minor Fluorite
|Calcite on Sphalerite with minor Fluorite
|Cave-in-Rock District, Hardin County, Illinois
|Large double-sided plate of lustrous transparent dark brown-black sphalerite crystals to 3 mm, with overgrowth of crusts of lustrous transparent colorless scalenohedral calcite crystals to 3 mm, plus scattered cubic purple fluorite crystals to 3 mm.
|micro to 3 mm
|For reference only
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