Fine specimens only rarely demonstrate crystal faces and these are prized above otherwise similar specimens. Color is copper colored with weathered specimens tarnished green. Luster is metallic. Transparency is opaque. Occasionally, massive forms will show some recognizable crystal faces on outer surfaces.
Cleavage is absent.
Fracture is jagged. Streak is reddish copper color. Associated Minerals are silver , calcite , malachite and other secondary copper minerals. Best Field Indicators are color, ductility and crystal habit.