Calcite vs Tourmaline
| Property | Calcite | Tourmaline |
|---|---|---|
| Formule | CaCO3 | Complex borosilicate |
| Système Cristallin | Trigonal | Trigonal |
| Classe Minérale | 05 Carbonates and Nitrates | 09 Silicates |
| Dureté Mohs | 3.0 | 7.0-7.5 |
| Couleur | Colorless, white, yellow, orange, blue, green | Black, green, pink, blue, watermelon |
| Éclat | Vitreous | Vitreous |
| Trait | White | Colorless |
| Transparence | Transparent | Transparent |
| Clivage | Perfect rhombohedral {1011} | None |
| Cassure | Conchoidal | Conchoidal to uneven |