| Mineral | Corundum |
|---|---|
| Formula | Al2O3 |
| Crystal Form | Trigonal/Hexagonal Scalenohedral [3 2/m] |
| Cleavage | None |
| Color | Colorless, Blue, Red, Pink, Yellow, Grey, Golden-brown |
| Density | 4.0 – 4.1 g/cm3 |
| Diaphaneity | Transparent, Translucent, Opaque |
| Fracture | Irregular/Uneven, Conchoidal |
| Hardness | 9.0 |
| Lustre | Adamantine, Vitreous, Pearly |
| Streak | White |
| Dana 8 Class | 4.3.1.1 |
| Strunz Class | IV/C.04-10 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 162 |