Difference between revisions of "Garnet"
From The Gemology Project
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Garnet is a group of minerals, with similar chemical composition and a common crystal habit. The following are the 6 members of the garnet family: | Garnet is a group of minerals, with similar chemical composition and a common crystal habit. The following are the 6 members of the garnet family: | ||
| − | Almandine | + | Almandine<br> |
| − | Pyrope | + | Pyrope<br> |
| − | Grossular | + | Grossular<br> |
| − | Spessartite | + | Spessartite<br> |
| − | Andradite | + | Andradite<br> |
Uvarovite | Uvarovite | ||
Revision as of 13:12, 2 October 2006
| Garnet | |
|---|---|
| Chemical composition | L3M2(SiO4)3
Isomorphous series |
| Crystal system | Cubic |
| Habit | Dodecahedra |
| Cleavage | None |
| Hardness | 6.5-7.5 |
| Optic nature | Isotropic |
| Refractive index | 1.74-1.89 |
| Birefringence | None |
| Specific gravity | 3.60-4.20 |
| Lustre | Vitreous to sub-adamantine |
Garnet is a group of minerals, with similar chemical composition and a common crystal habit. The following are the 6 members of the garnet family:
Almandine
Pyrope
Grossular
Spessartite
Andradite
Uvarovite
