Fluorite with Chalcopyrite

Minerva I Mine, Spivey shaft, Ozark-Mahoning group, Cave-in-Rock Sub-District, Hardin County, Illinois  USA (1974)

Specimen size: 13.7 × 10.3 × 1.7 cm = 5.39” × 4.06” × 0.67”
Main crystal size: 1.5 × 1.3 cm = 0.59” × 0.51”