Celestine vs Turquoise
| Property | Celestine | Turquoise |
|---|---|---|
| Formula | SrSO4 | CuAl6(PO4)4(OH)8 · 4H2O |
| Crystal System | Orthorhombic | Triclinic |
| Mineral Class | 07 Sulfates, Chromates, Molybdates, and Tungstates | 08 Phosphates, Arsenates, and Vanadates |
| Mohs Hardness | 3.0-3.5 | 5.0-6.0 |
| Color | Colorless, pale blue, white, yellow | Sky blue, blue-green, green |
| Luster | Vitreous | Waxy |
| Streak | White | White to pale green |
| Transparency | Transparent | Translucent |
| Cleavage | Perfect {001} | None |
| Fracture | Uneven | Conchoidal |