Cuprite

Mont-Roc Mine, Mont-Roc, Castres, Tarn, Occitanie  France

Specimen size: 5.7 × 4.5 × 3 cm = 2.24” × 1.77” × 1.18”
Main crystal size: 0.4 × 0.2 cm = 0.16” × 0.08”