Celestine vs Labradorite
| Property | Celestine | Labradorite |
|---|---|---|
| Formula | SrSO4 | (Ca,Na)(Al,Si)4O8 |
| Crystal System | Orthorhombic | Triclinic |
| Mineral Class | 07 Sulfates, Chromates, Molybdates, and Tungstates | 09 Silicates |
| Mohs Hardness | 3.0-3.5 | 6.0-6.5 |
| Color | Colorless, pale blue, white, yellow | Gray, dark gray with labradorescence (blue, gold, green) |
| Luster | Vitreous | Vitreous |
| Streak | White | White |
| Transparency | Transparent | Translucent |
| Cleavage | Perfect {001} | Perfect {001}, good {010} |
| Fracture | Uneven | Conchoidal to uneven |