Polybasite | |
Chemical Formula |
[(Ag,Cu)6(Sb,As)2S7][Ag9CuS4] |
Species |
Sulfides |
Crystal System |
Monoclinic |
Mohs Scale |
2-3 |
Specific Gravity |
6-6.2 |
Color |
Black with dark ruby red internal reflections |
Streak |
black with reddish tint |
Luster |
Metallic |
Diaphaneity |
Opaque |
Cleavage |
Imperfect/FairImperfect on |
Fracture |
Conchoidal |
Crystal Habit:Always in pseudo hexagonal trillings, as tablets and rosettes | |
Geological Setting:In low to medium temperature hydrothermal veins |