| Mineral | Pyrolusite |
|---|---|
| Formula | Mn⁴⁺O₂ |
| Crystal Form | Tetragonal/Ditetragonal-Dipyramidal [4/m 2/m 2/m] |
| Cleavage | Perfect on {110} |
| Color | Black, Very dark grey |
| Density | 5.0 – 5.1 g/cm3 |
| Diaphaneity | Opaque |
| Fracture | Irregular/Uneven |
| Hardness | 2.0 - 6.5 |
| Lustre | Metallic, Dull, Earthy |
| Streak | Black, Bluish-black |
| Dana 8 Class | 4.4.1.4 |
| Strunz Class | 4/D.02-20 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 464 |