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Alleghanyite
Type Locality
Bald Knob, Sparta, Alleghany County, North Carolina, United States of America
Mineral Data
Mn
2+
5
(SiO
4
)
2
(OH)
2
Strunz:
9.AF.45
Physical Properties
Crystal System:
Monoclinic
Hardness:
5.5
Tenacity:
brittle
