Physical Properties |
|
| Chemical formula | Fe1-xS |
| Class | Sulfide |
| Crystal system | Hexagonal |
| Habit | Massive Disseminated Hexagonal plates or tabs, often twinned (rare) |
| Color | Yellow to reddish bronze |
| Hardness | 4 |
| Specific gravity | 4.6 |
| Cleavage | Poor (001) |
| Fracture | Uneven |
| Luster | Metallic |
| Transparency | Opaque |
| Streak | Gray to black |
| after Perkins, 358 |