Chalcocite with Chalcopyrite

Tongshankou Mine, Edong, Daye, Huangshi Prefecture, Hubei Province  China (2013)

Specimen size: 3.6 × 2.6 × 1.6 cm = 1.42” × 1.02” × 0.63”
Main crystal size: 1.3 × 0.2 cm = 0.51” × 0.08”