|
Hard- ness |
Cleavage |
Fracture |
Trans- parency |
10% HCl Reaction |
SG |
Luster |
Color |
Streak |
Xtal Form |
Mineral Class |
Comments | proustite | 2.00 | perfect | Uneven | Translucent | none | 5.57 | glassy | red | red | faceted | sulfides | Fragile. When exposed to air & light luster becomes submetallic with gray streak. |
|