Spessartite
From The Gemology Project
Revision as of 01:14, 30 November 2006 by Africanuck (talk | contribs)
Spessartite Garnet | |
---|---|
Chemical composition | Mn3Al2(SiO4)3
Manganese aluminum silicate |
Crystal system | Cubic |
Habit | Dodecahedra |
Cleavage | None |
Hardness | 7 |
Optic nature | Isotropic |
Refractive index | 1.795-1.815 |
Birefringence | None |
Specific gravity | 4.12-4.20 |
Lustre | Vitreous |