| Structure : Orthorhombic Hardness : 5.5 Specific Gravity : 3.27 Refractive index : 1.66 - 1.6 Doubly Refracting (bi-refraction) : 0.01 |
| Structure : Orthorhombic Hardness : 5.5 Specific Gravity : 3.27 Refractive index : 1.66 - 1.6 Doubly Refracting (bi-refraction) : 0.01 |