Moonstone
From The Gemology Project
| Moonstone | |
|---|---|
| Chemical composition | K-feldspar |
| Crystal system | Monoclinic |
| Habit | Prismatic |
| Cleavage | Distinct to perfect |
| Fracture | Conchoidal |
| Hardness | 6 |
| Optic nature | Biaxial - |
| Refractive index | ± 1.52 |
| Specific gravity | 2.56 |
| Lustre | Vitreous |
Moonstone cabochon
Photo courtesy of Rick Martin
Art Cut Gems
Photo courtesy of Rick Martin
Art Cut Gems
