Azurite vs Celestine
| Property | Azurite | Celestine |
|---|---|---|
| Formula | Cu3(CO3)2(OH)2 | SrSO4 |
| Crystal System | Monoclinic | Orthorhombic |
| Mineral Class | 05 Carbonates and Nitrates | 07 Sulfates, Chromates, Molybdates, and Tungstates |
| Mohs Hardness | 3.5-4.0 | 3.0-3.5 |
| Color | Azure blue, dark blue | Colorless, pale blue, white, yellow |
| Luster | Vitreous | Vitreous |
| Streak | Light blue | White |
| Transparency | Transparent | Transparent |
| Cleavage | Perfect {011}, fair {100} | Perfect {001} |
| Fracture | Conchoidal | Uneven |