Mineral: Calcite
Locality: Mahoning No. 4 Mine, Ozark-Mahoning group, Cave-in-Rock Sub-District, Hardin County, Illinois, USA
Dimensions: 5.0 x 8.5 cm

Description: Elongated calcite scalenohedrons to 4.0 cm, with associated barite on matrix. Mined in the 1960s.

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