Jadeite
From The Gemology Project
Jadeite | |
---|---|
Chemical composition | NaAl(SiO3)2 |
Crystal system | Monoclinic |
Habit | Polycrystalline |
Fracture | Flintery |
Hardness | 6.5 -7 |
Specific gravity | 3.30 - 3.37 |
Lustre | Greasy to vitreous |
Jadeite is made up of interlocking pyroxene crystals. It occurs in a vary wide range of colors like green, lilac, white, pink, brown, red, blue, black, orange and yellow. The most prized color is a rich emerald green and is called Imperial Jade. Its green color is due to its chromium content and can be distinguished with a Chelsea (jadeite) filter. Jadeite is believed to prevent/cure hip and kidney ailments.
Enhancements
Common enhancements to jadeite:
- Fracture filling - wax - conceal cracks and fractures
- Coatings - wax - to improve luster
- Staining - color improvement through dyes
- Bleaching - removes stains
- Polymer impregnation - improves luster and to stabilize piece after bleaching
Occurrence
The most important source of jadeite is Myanmar but Guatemala, Japan and the USA (California) are also important sources
Sources consulted
- Smithsonian Handbooks, Gemstones, Second Edition 2002