Calcite (twinned)

Largentière Mines, Largentière, Vallon-Pont-d'Arc, Ardèche, Auvergne-Rhône-Alpes  France (±1980)

Specimen size: 7.6 × 6.1 × 5.7 cm = 2.99” × 2.40” × 2.24”
Main crystal size: 7 × 4.4 cm = 2.76” × 1.73”