Calcite

Curebourse, Vic-sur-Cère, Aurillac, Cantal, Auvergne-Rhône-Alpes  France

Specimen size: 12.3 × 11.7 × 6.7 cm = 4.84” × 4.61” × 2.64”
Main crystal size: 1 × 1 cm = 0.39” × 0.39”