Calcite (twinned) with Sphalerite

Trèves Mine, Fournels Valley, Trèves, Gard, Occitanie  France (1971)

Specimen size: 8.5 × 8.3 × 6.2 cm = 3.35” × 3.27” × 2.44”
Main crystal size: 7.1 × 3 cm = 2.80” × 1.18”