Chalcocite with Calcite

Las Cruces Mine, Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain

Specimen size: 5.5 × 3.5 × 1.6 cm = 2.17” × 1.38” × 0.63”
Main crystal size: 0.5 × 0.4 cm = 0.20” × 0.16”