Siderite with Calcite

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

Specimen size: 6.6 × 3.6 × 4.5 cm = 2.60” × 1.42” × 1.77”
Main crystal size: 5.2 × 3.2 cm = 2.05” × 1.26”