Calcite (twinned)

Áliva Mine (Las Mánforas Mine), level 2, Áliva mining area, Picos de Europa massif, Camaleño, Comarca Liébana, Cantabria  Spain (2006)

Specimen size: 7.9 × 6.7 × 4.5 cm = 3.11” × 2.64” × 1.77”
Main crystal size: 2.3 × 1.4 cm = 0.91” × 0.55”