Sphalerite with Dolomite, Chalcopyrite and Siderite

Troya Mine, Troya mining concession, Mutiloa / Gabiria, Comarca Goyerri / Goierri, Guipúzcoa / Gipuzkoa, Basque Country (Euskadi)  Spain (±1984)

Specimen size: 4.9 × 4.7 × 3.3 cm = 1.93” × 1.85” × 1.30”
Main crystal size: 1.1 × 0.7 cm = 0.43” × 0.28”