Sphalerite

Troya Mine, Mutiloa, Comarca Goyerri, Guipúzcoa / Gipuzkoa, Basque Country (Euskadi)  Spain (1990)

Specimen size: 3.3 × 2.5 × 1.0 cm = 1.30” × 0.98” × 0.39”
Main crystal size: 0.5 × 0.5 cm = 0.20” × 0.20”