Mineralpedia Details for 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
- WebMineral
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- Mindat
- View Alleghanyite
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.
Click thumbnail images for larger view.
