Fluorite with Calcite
specimen number:
1604315
location:
Cave in Rock, Hardin Co., Illinois, USA
description:
A grouping of glassy mostly gemmy cubic fluorite crystals, this exhibiting a large penetration twinned. Crystals of calcite are present as well. Slight micro-damage present, this still in good condition. This type of twinning for the species from this mining district was never terribly common.
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