Labradorite vs Staurolite
| Property | Labradorite | Staurolite |
|---|---|---|
| Formula | (Ca,Na)(Al,Si)4O8 | Fe2Al9Si4O23(OH) |
| Crystal System | Triclinic | Monoclinic |
| Mineral Class | 09 Silicates | 09 Silicates |
| Mohs Hardness | 6.0-6.5 | 7.0-7.5 |
| Color | Gray, dark gray with labradorescence (blue, gold, green) | Dark reddish-brown to black |
| Luster | Vitreous | Vitreous |
| Streak | White | Gray to white |
| Transparency | Translucent | Translucent |
| Cleavage | Perfect {001}, good {010} | Poor {010} |
| Fracture | Conchoidal to uneven | Subconchoidal |