Bowenite
From The Gemology Project
| Bowenite (Serpentine) | |
|---|---|
| Chemical composition | Mg6((OH)8)Si4O10) |
| Crystal system | Mostly monoclinic |
| Habit | Cryptocrystalline |
| Cleavage | None |
| Fracture | Even to hackly |
| Hardness | 2-5.5 |
| Optic nature | None |
| Refractive index | ±1.55 |
| Birefringence | None |
| Dispersion | None |
| Specific gravity | 2.59 |
| Lustre | Waxy |
| Pleochroism | None |
