Siderite with Quartz

La Mure coal mines, La Mure, Matheysine-Trièves, Grenoble, Isère, Auvergne-Rhône-Alpes  France

Specimen size: 12.4 × 6.1 × 2.5 cm = 4.88” × 2.40” × 0.98”
Main crystal size: 1.7 × 1.2 cm = 0.67” × 0.47”