Physical Properties |
|
| Chemical formula | FeAsS |
| Class | Sulfide |
| Crystal system | Monoclinic |
| Habit | Prismatic, striated crystals Disseminated Massive Granular |
| Color | Silver-white |
| Hardness | 5.5 to 6 |
| Specific gravity | 6.1 |
| Cleavage | Good (101) |
| Fracture | Uneven |
| Luster | Metallic |
| Transparency | Opaque |
| Streak | Black |
| Twinning | Penetration Contact Cyclic |
| after Perkins, 363 |