Sphalerite, Dolomite, Siderite

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

Specimen size: 10.2 × 9.8 × 5.5 cm = 4.02” × 3.86” × 2.17”
Main crystal size: 1.1 × 0.7 cm = 0.43” × 0.28”