Click for expanded view
Hardness: 2.5 - 3
Density: 5.5 - 5.8
Streak: Blackish lead-gray
Lustre: Dull metallic
Habit: Chunky fracture, massive habit.
Colours: Blackish lead-gray
| ||Crystal System: Monoclinic|
Reaction with HCl: None
Identification in hand sample:
Black colour with sooty appearance on weathered surfaces and sectile character are distinctive. Bronze-yellow on fresh surfaces.
Found in the supergene-enriched zone of copper-bearing hydrothermal sulfide deposits.
Industrial / ecomonic uses:
Mined as a source of copper.
A substantial amount of material identified as chalcocite may actually be djurleite (Cu31S16), as they are very commonly intergrown.