General Information:
Chemical Formula:(K,Na)2(Mn,Al,Mg)8(Si,Al)12O29(OH)7·8-9(H2O)
Environment:Metamorphosed manganese deposit.
Locality:Harstig mine, Pajsberg, near Persberg, Vermland, Sweden.
Physical Properties: Cleavage:[???] Perfect
Color:brownish yellow or cinnamon brown.
Density:2.84
Diaphaniety:Transparent to translucent
Habits:Foliated - Two dimensional platy forms., Micaceous - Platy texture with "flexible" plates.,
Hardness:4-4.5 - Between Fluorite and Apatite
Luminescence:Non-fluorescent.
Luster:Vitreous (Glassy)
Streak:brownish yellow
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