Calcite, Pyrite
Pilot Knob Mine, Pilot Knob, Iron County, Missouri, USA
7.4 x 4.9 x 4.9 cm. A 4.5-cm calcite crystal, with purplish hues from inclusions of hematite, leaning out from a plate of oxidized sulfides, covered with sparkly pyrites and layered with more calcite and pyrite. The hematite inclusions here and there spread the purplish hue around. George Feist Collection.
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