Alleghanyite
A variety of Minerals
What is Alleghanyite?
Alleghanyite is a moderately rare humite mineral with formula Mn5(SiO4)2(OH)2, belonging to the nesosilicates class. In general its occurrences are related with metamorphic (metamorphosed) manganese deposits. The mineral is named after Alleghany County, North Carolina, US.
Alleghanyite Market Value Calculator
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Alleghanyite Localities Map
See where Alleghanyite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Map preview
North ZoneCentral RidgeSouth Basin
Quick Facts
Physical Properties
- Color
- Pinkish to reddish brown, deep pink, grayish pink
- Hardness (Mohs)
- 5.5
- Density
- 3.96 g/cm³
- Streak
- Very pale pink
Chemical Properties
- Chemical Formula
- Mn2+5(SiO4)2(OH)2
- Elements
- H, Mn, O, Si
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