Sphalerite with Dolomite and Siderite

Troya Mine, Mutiloa, Comarca Goyerri, Guipúzcoa / Gipuzkoa, Basque Country (Euskadi)  Spain (1985)

Specimen size: 8.4 × 5.6 × 4.2 cm = 3.31” × 2.20” × 1.65”
Main crystal size: 1.8 × 1.7 cm = 0.71” × 0.67”