| Mineral | Topaz |
|---|---|
| Formula | Al2[(F,OH)2|SiO4] |
| Crystal Form | Orthorhombic/Dipyramidal [2/m 2/m 2/m] |
| Cleavage | [001] Perfect |
| Color | Colorless, White, Pale blue, Light green, Yellow, Yellowish brown, Red |
| Density | 3.4 – 3.6 g/cm3 |
| Diaphaneity | Transparent to Translucent |
| Fracture | Irregular/Uneven, Sub-Conchoidal |
| Hardness | 8.0 |
| Lustre | Vitreous |
| Streak | White |
| Dana 8 Class | 52.3.1.1 |
| Strunz Class | VIII/B.02-70 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 159 |