| Mineral | Ferrosilite |
|---|---|
| Formula | Fe2+2Si2O6 |
| Crystal Form | Orthorhombic/Dipyramidal [2/m 2/m 2/m] |
| Cleavage | Very good on {210}, Parting on {100}, {010} |
| Color | Dark brown to Black |
| Density | 3.6 – 4.0 g/cm3 |
| Diaphaneity | Transparent, Translucent |
| Fracture | Irregular/Uneven, Splintery |
| Hardness | 5.0 - 6.0 |
| Lustre | Vitreous, Sub-vitreous, Greasy |
| Streak | Pale gray-brown |
| Dana 8 Class | 65.1.2.2 |
| Strunz Class | 8/F.02-20 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 419 |