Grossular is a member of the garnet family. Please see the garnet page for images and videos.
The garnet family also includes almandine, pyrope, and spessartine.
Physical Properties |
|
| Chemical formula | Ca3Al2Si3O12 |
| Class | Nesosilicate Isolated tetrahedra |
| Crystal system | Cubic |
| Habit | Dodecahedral Trapezohedral Usually euhedral to subhedral |
| Color | Pink Brown Yellow Green |
| Hardness | 6.5 |
| Specific gravity | 3.56 |
| Cleavage | None |
| Fracture | Subconchoidal |
| Luster | Resinous |
| Transparency | Transparent to translucent |
| Streak | White |
Optical Properties |
|
| PPL | High relief Colorless to very pale May appear mottled gray |
| XPL | Isotropic |
| δ | None |
| after Perkins, 339 |