Fluorite with Chalcopyrite

Minerva I Mine, Ozark-Mahoning group, Cave-in-Rock Sub-District, Hardin County, Illinois  USA

Specimen size: 14.7 × 13.4 × 4.9 cm = 5.79” × 5.28” × 1.93”
Main crystal size: 4.8 × 3 cm = 1.89” × 1.18”