Biotite vs Turquoise
| Property | Biotite | Turquoise |
|---|---|---|
| Fórmula | K(Mg,Fe)3(AlSi3O10)(OH)2 | CuAl6(PO4)4(OH)8 · 4H2O |
| Sistema Cristalino | Monoclinic | Triclinic |
| Classe Mineral | 09 Silicates | 08 Phosphates, Arsenates, and Vanadates |
| Dureza Mohs | 2.5-3.0 | 5.0-6.0 |
| Cor | Black, dark brown, dark green | Sky blue, blue-green, green |
| Brilho | Vitreous | Waxy |
| Traço | White to gray | White to pale green |
| Transparência | Translucent | Translucent |
| Clivagem | Perfect basal {001} | None |
| Fratura | Uneven | Conchoidal |