| Mineral | Kyanite |
|---|---|
| Formula | Al2[O | SiO4] |
| Crystal Form | Triclinic/Pinacoidal [1] |
| Cleavage | [100] Perfect, [010] Imperfect |
| Color | Blue, White, Gray, Green, Black |
| Density | 3.6 – 3.7 g/cm3 |
| Diaphaneity | Translucent to transparent |
| Fracture | Brittle |
| Hardness | 4.0 - 7.0 |
| Lustre | Vitreous - Pearly |
| Streak | White |
| Dana 8 Class | 52.2.2c.1 |
| Strunz Class | VIII/B.02-40 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 77 |