Sphalerite with Dolomite, Chalcopyrite and Pyrite

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

Specimen size: 6.2 × 4.2 × 2.7 cm = 2.44” × 1.65” × 1.06”
Main crystal size: 0.7 × 0.6 cm = 0.28” × 0.24”