Calcite vs Corundum
| Property | Calcite | Corundum |
|---|---|---|
| Fórmula | CaCO3 | Al2O3 |
| Sistema Cristalino | Trigonal | Trigonal |
| Classe Mineral | 05 Carbonates and Nitrates | 04 Oxides and Hydroxides |
| Dureza Mohs | 3.0 | 9.0 |
| Cor | Colorless, white, yellow, orange, blue, green | Red (ruby), blue (sapphire), various colors |
| Brilho | Vitreous | Adamantine |
| Traço | White | Colorless |
| Transparência | Transparent | Transparent |
| Clivagem | Perfect rhombohedral {1011} | None |
| Fratura | Conchoidal | Conchoidal to uneven |