Charoite
From The Gemology Project
| Charoite | |
|---|---|
| Chemical composition | Complex potassium silicate |
| Crystal system | Monoclinic |
| Hardness | 7 - 7.5 |
| Optic nature | Biaxial - |
| Refractive index | 1.545 - 1.560 |
| Specific gravity | 2.66 - 2.68 |
Charoite
