Template:Demantoid
From The Gemology Project
Revision as of 11:40, 1 November 2006 by Africanuck (talk | contribs)
Demantoid Garnet | |
---|---|
Chemical composition | Ca3Fe2(SiO4)3
Calcium Iron Silicate |
Crystal system | Cubic |
Habit | dodecahedra |
Cleavage | none |
Hardness | 6.5 |
Optic nature | isotrope |
Refractive index | 1.85-1.89 |
Birefringence | none |
Specific gravity | 3.85 |
Lustre | vitreous to adamantine |