Nephrite
From The Gemology Project
Nephrite | |
---|---|
Chemical composition | Complex Ca Mg/Fe (calcium magnesium/iron) silicate |
Crystal system | Monoclinic |
Habit | Polycrystalline |
Fracture | Splintery |
Hardness | 6.5 |
Refractive index | ±1.62 |
Specific gravity | 2.90 - 3.20 |
Lustre | Greasy to vitreous |
Enhancements
Common enhancements to nephrite:
- Fracture filling - wax - conceal cracks and fractures
- Coatings - wax - to improve luster