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Mineralpedia Details for Alleghanyite

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Alleghanyite

Alleghanyite

Formula
Mn2+5(SiO4)2(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Massive - Lamellar, Granular 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
white, brown, bright pink, grayish pink 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
6-5 
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Alleghanyite from Sterling Hill mine, Ogdensburg, Sussex Co., New Jersey, United States

Alleghanyite
            from Sterling Hill mine, Ogdensburg, Sussex Co., New Jersey, United States

Superb wine colored - light red - crystal groups of Alleghanyite to 2mm, the best cluster is 1mm as photographed. There are several groups, maybe around 4 or 5 but are malformed by growth contraints. Scattered around the fracture opening in which the Alleghanyite occurs are yellow Baryte crystals from 0.5 to 1mm.

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