Almandine
Chemical Formula	Fe2+3Al2Si3O12
Species	Silicates
Crystal System	Isometric
Mohs Scale	7
Specific Gravity	4.05
Color	reddish orange to red, slightly purplish red to reddish purple and usually dark in tone
Streak	White
Luster	Vitreous, Resinous
Refractive Index	n = 1.83
Diaphaneity	Transparent, Translucent
Cleavage	none
Fracture	Sub-Conchoidal
Crystal Habit：Typically well-formed dodecahedra or trapezohedra, to 1 m; also in rounded grains and massive.
Geological Setting：The most common garnet, typically in mica schists and gneisses, from regionally metamorphosed argillaceous sediments and pelites; also in contact metamorphic hornfels. In granites and eclogites; in sedimentary rocks; as a detrital mineral.