Calcite vs Corundum
| Property | Calcite | Corundum |
|---|---|---|
| Formule | CaCO3 | Al2O3 |
| Système Cristallin | Trigonal | Trigonal |
| Classe Minérale | 05 Carbonates and Nitrates | 04 Oxides and Hydroxides |
| Dureté Mohs | 3.0 | 9.0 |
| Couleur | Colorless, white, yellow, orange, blue, green | Red (ruby), blue (sapphire), various colors |
| Éclat | Vitreous | Adamantine |
| Trait | White | Colorless |
| Transparence | Transparent | Transparent |
| Clivage | Perfect rhombohedral {1011} | None |
| Cassure | Conchoidal | Conchoidal to uneven |