Apatite vs Celestine
| Property | Apatite | Celestine |
|---|---|---|
| Formula | Ca5(PO4)3(F,Cl,OH) | SrSO4 |
| Crystal System | Hexagonal | Orthorhombic |
| Mineral Class | 08 Phosphates, Arsenates, and Vanadates | 07 Sulfates, Chromates, Molybdates, and Tungstates |
| Mohs Hardness | 5.0 | 3.0-3.5 |
| Color | Green, blue, yellow, violet, colorless | Colorless, pale blue, white, yellow |
| Luster | Vitreous | Vitreous |
| Streak | White | White |
| Transparency | Transparent | Transparent |
| Cleavage | Poor {0001} | Perfect {001} |
| Fracture | Conchoidal to uneven | Uneven |