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Alleghanyite: Mn5(SiO4)2(OH)2
Comments: Massive, brown alleghanyite with white calcite. Location: Parker Shaft, Franklin, Sussex County, New Jersey. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Alleghanyite: Mn5(SiO4)2(OH)2 Galaxite: (Mn,Mg)(Al,Fe+++)2O4
Comments: Black granular galaxite with reddish alleghanyite and white kutnohorite. Location: Bald Knob, Alleghany County, North Carolina, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species