Corundum vs Turquoise
| Property | Corundum | Turquoise |
|---|---|---|
| Fórmula | Al2O3 | CuAl6(PO4)4(OH)8 · 4H2O |
| Sistema Cristalino | Trigonal | Triclinic |
| Clase Mineral | 04 Oxides and Hydroxides | 08 Phosphates, Arsenates, and Vanadates |
| Dureza Mohs | 9.0 | 5.0-6.0 |
| Color | Red (ruby), blue (sapphire), various colors | Sky blue, blue-green, green |
| Brillo | Adamantine | Waxy |
| Raya | Colorless | White to pale green |
| Transparencia | Transparent | Translucent |
| Exfoliación | None | None |
| Fractura | Conchoidal to uneven | Conchoidal |