Enstatite
From The Gemology Project
| Enstatite | |
|---|---|
| Chemical composition | (Mg,Fe)SiO3
Magnesium silicate |
| Crystal system | Orthorhombic |
| Habit | Crystals and waterworn pebbles |
| Cleavage | Distinct |
| Fracture | Sub-conchoidal |
| Hardness | 5.5 |
| Optic nature | Biaxial + |
| Refractive index | 1.65-1.68 |
| Birefringence | 0.010 |
| Dispersion | Low, 0.010 |
| Specific gravity | 3.3 |
| Lustre | Vitreous |
| Pleochroism | Strong to moderate |
