Sphalerite with Dolomite and Siderite

La Mure coal mines, La Mure, Matheysine-Trièves, Grenoble, Isère, Auvergne-Rhône-Alpes  France (±1980)

Specimen size: 9.8 × 7.2 × 4.4 cm = 3.86” × 2.83” × 1.73”
Main crystal size: 3.7 × 3.3 cm = 1.46” × 1.30”