Template:Almandine
From The Gemology Project
Almandine Garnet | |
---|---|
Chemical composition | Fe3Al2(SiO4)3
Iron aluminum silicate |
Crystal system | Cubic |
Habit | Dodecahedra |
Cleavage | None |
Hardness | 7.5 |
Optic nature | Isotropic |
Refractive index | 1.78-1.81 |
Birefringence | None |
Specific gravity | 3.95 - 4.20 |
Lustre | Vitreous |