Aragonite with Calcite

Gergovie, La-Roche-Blanche, Veyre-Monton, Puy-de-Dôme Department, Auvergne-Rhône-Alpes  France

Specimen size: 15.3 × 9.8 × 5 cm = 6.02” × 3.86” × 1.97”
Main crystal size: 1 × 0.1 cm = 0.39” × 0.04”