Sphalerite with Dolomite and Siderite

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

Specimen size: 11.6 × 9.1 × 6.3 cm = 4.57” × 3.58” × 2.48”
Main crystal size: 1 × 0.7 cm = 0.39” × 0.28”