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Manganogrunerite Var Asbeferrite

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SHS618918

Manganogrunerite Var Asbeferrite

Description Tabs

Description
Locality: 
Brunnsjögruvan, Grythyttan, Hällefors, Örebro County, Sweden
Class: 
Massive/Crystalline
Size Range: 
Thumbnail (1-3cm)
Size: 
1.8 × 1 × 0.2 cm
Description

Nice piece of asbeferrite

Mineral Data
What's on the rock

Manganogrunerite

Formula: 
☐{Mn2+2}{Fe2+5}(Si8O22)(OH)2
Strunz: 
9.DE.05
Crystal System: 
Monoclinic
Hardness: 
5.0 - 6.0
Colour: 
nd
Streak: 
nd
Type Locality: 
Dannemora mine, Dannemora, Östhammar, Uppland, Sweden