Andradite
From The Gemology Project
Revision as of 02:01, 3 October 2006 by Africanuck (talk | contribs)
Andradite Garnet | |
---|---|
Chemical composition | Ca3Fe2(SiO4)3
Calcium Iron Silicate |
Crystal system | Cubic |
Habit | Dodecahedra |
Cleavage | None |
Hardness | 6.5 |
Optic nature | Isotropic |
Refractive index | 1.85-1.89 |
Birefringence | None |
Specific gravity | 3.85 |
Lustre | Vitreous to adamantine |
Demantoid - green Melanite - black, opaque Topazolite - Lemon yellow