Sphalerite

Áliva Mine (Las Mánforas Mine), level 3, Áliva mining area, Camaleño, Comarca Liébana, Cantabria  Spain (2004)

Specimen size: 4.4 × 2.7 × 1.9 cm = 1.73” × 1.06” × 0.75”
Main crystal size: 1.8 × 1.8 cm = 0.71” × 0.71”