Nephrite
From The Gemology Project
Revision as of 09:11, 28 September 2006 by Africanuck (talk | contribs)
Nephrite | |
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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 |