Sphalerite with Dolomite and Chalcopyrite

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

Specimen size: 14 × 11.3 × 7.8 cm = 5.51” × 4.45” × 3.07”
Main crystal size: 1.2 × 1 cm = 0.47” × 0.39”