Grossular
Chemical Formula	Ca3Al2(SiO4)3
Species	Silicates
Crystal System	Isometric
Mohs Scale	6-7
Specific Gravity	3.61
Color	light to dark green, light to dark yellow to reddish brown, occasionally translucent to opaque pink. It is also but rarely found in colorless form [1]
Streak	White to pale Brownish white
Luster	Vitreous, Sub-Vitreous
Refractive Index	n = 1.731 - 1.754
Diaphaneity	Transparent, Translucent
Cleavage	None Observed
Fracture	Irregular/Uneven, Sub-Conchoidal
Crystal Habit：Dodecahedra or trapezohedra, granular, compact, massive. May have hexoctahedral faces. Rarely tetrahexahedral or octahedral.
Geological Setting：Contact and regionally metamorphosed calcareous rocks.