Spinel vs Topaz
| Property | Spinel | Topaz |
|---|---|---|
| Formula | MgAl2O4 | Al2SiO4(F,OH)2 |
| Crystal System | Cubic (Isometric) | Orthorhombic |
| Mineral Class | 04 Oxides and Hydroxides | 09 Silicates |
| Mohs Hardness | 7.5-8.0 | 8.0 |
| Color | Red, blue, green, black, colorless | Colorless, yellow, blue, pink, orange |
| Luster | Vitreous | Vitreous |
| Streak | White | Colorless |
| Transparency | Transparent | Transparent |
| Cleavage | None | Perfect {001} |
| Fracture | Conchoidal | Conchoidal to uneven |