| Mineral | Stilpnomelane |
|---|---|
| Formula | K(Fe2+,Mg,Fe3+)8(Si,Al)12(O,OH)27 • n(H2O) |
| Crystal Form | Triclinic/Pinacoidal [1] |
| Cleavage | [001] Perfect |
| Color | Brown red, Green, Golden brown, Black |
| Density | 2.8 – 3.0 g/cm3 |
| Diaphaneity | Subtranslucent to opaque |
| Fracture | Brittle |
| Hardness | 3.0 |
| Lustre | Vitreous - Dull |
| Streak | Gray white |
| Dana 8 Class | 74.1.1.1 |
| Strunz Class | VIII/H.17-40 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 194 |