Chalcocite with Calcite

Tongshankou Mine, Edong, Daye, Huangshi Prefecture, Hubei Province  China (2019)

Specimen size: 5.3 × 3 × 2.1 cm = 2.09” × 1.18” × 0.83”
Main crystal size: 0.7 × 0.3 cm = 0.28” × 0.12”