Rhodonite
Chemical Formula	(Mn2+,Fe2+,Mg,Ca)SiO3
Species	Silicates
Crystal System	Triclinic
Mohs Scale	5-6
Specific Gravity	3.57-3.76
Color	Rose-pink to brownish red, gray, or yellow
Streak	White
Luster	Vitreous, Pearly
Refractive Index	n = 1.711 - 1.738 n = 1.714 - 1.741 n = 1.724 - 1.751
Diaphaneity	Transparent, Translucent
Cleavage	PerfectPerfect on & Good on
Fracture	Irregular/Uneven, Conchoidal
Crystal Habit：Tabular crystals, massive, granular
Geological Setting：Manganese deposits formed by hydrothermal, contact or regional metamorphic, and sedimentary processes.