Sphalerite with Siderite

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

Specimen size: 6.7 × 6 × 4.2 cm = 2.64” × 2.36” × 1.65”
Main crystal size: 0.6 × 0.5 cm = 0.24” × 0.20”