General Information:
Chemical Formula:(K,Na,Ca)(Mn,Al)7Si8O20(OH)8·2(H2O) (?)
Environment:Manganese deposits.
Locality:Parsettens Alp, Val d'Err, Grisons, Switzerland.
Name Origin:Named after its locality.
Physical Properties: Cleavage:[001] Perfect
Color:copper red.
Density:2.59
Diaphaniety:Translucent to subtranslucent
Habits:Massive - Lamellar - Distinctly foliated fine-grained forms., Micaceous - Platy texture with "flexible" plates.,
Hardness:1.5 - Between Talc and Gypsum
Luster:Vitreous (Glassy)
Streak:brownish yellow
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