Andradite
Chemical Formula	Ca3Fe2(SiO4)3
Species	Silicates
Crystal System	Isometric
Mohs Scale	6-7
Specific Gravity	3.8-3.9
Color	Yellow, greenish yellow to emerald-green, dark green; brown, brownish red, brownish yellow; grayish black, black; may be sectored
Streak	White
Luster	Adamantine, Resinous, Dull
Refractive Index	n = 1.887
Diaphaneity	Transparent, Translucent
Cleavage	none
Fracture	Irregular/Uneven, Conchoidal
Crystal Habit：Commonly well-crystallized dodecahedra, trapezohedra, or combinations, also granular to massive
Geological Setting：In skarns from contact metamorphosed impure limestones or calcic igneous rocks; in chlorite schists and serpentinites; in alkalic igneous rocks, then typically titaniferous.