Chalcocite on Pyrite

Las Cruces Mine, Gerena-Guillena-Salteras, Comarca Sierra Norte, Seville, Andalusia  Spain (2019)

Specimen size: 9.1 × 8.3 × 2.7 cm = 3.58” × 3.27” × 1.06”
Main crystal size: 1 × 0.4 cm = 0.39” × 0.16”