Physical properties
Habit: cubic euhedral crystals, tarnishes to purple.
Color: bronze.
Luster: metallic.
Diaphaneity: opaque.
Cleavage: {111}.
Twinning: {111}.
Fracture: conchoidal.
Others: p-type semconductor with ΔEg = 0.1 eV due to covellite or digenite inclusions;
electrical resistivity 3 to 570 Ω.m.
