LithoCat

MineralChalcocite
FormulaCu2S
Crystal FormMonoclinic/Prismatic [2/m]
CleavageIndistinct on (110)
ColorBlue black, Gray, Black, Black gray, Steel Gray
Density5.5 – 5.8 g/cm3
DiaphaneityOpaque
FractureConchoidal
Hardness2.5 - 3.0
LustreMetallic
StreakBlackish Gray
Dana 8 Class2.4.7.1
Strunz Class2/B.01-10
Mindatmindat.org
WebMineralWebMineral
ID339