Alleghanyite
Chemical Formula	Mn5(SiO4)2(OH)2
Species	Silicates
Crystal System	Monoclinic
Mohs Scale	5
Specific Gravity	4-4.11
Color	Brown, bright pink, grayish pink, white
Luster	Vitreous, Dull
Refractive Index	n = 1.756 n = 1.780 n = 1.792
Diaphaneity	Transparent, Translucent
Cleavage	None
Fracture	Conchoidal
Crystal Habit：Granular; anhedral to subhedral crystals in matrix
Geological Setting：in veins crosscutting franklinite ore near pegmatites in a metamorphosed stratiform Zn-Mn deposit