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Mineralpedia Details for Manganogrunerite

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Manganogrunerite

Manganogrunerite

Formula
[box]Mn2+2Fe2+5Si8O22(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Massive - Fibrous, Radial 
Cleavage
Perfect, Imperfect, None 
Luster
Vitreous - Silky 
Color
brown, gray green, yellow green, dark green 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Conchoidal 
Hardness
5-6 
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Manganogrunerite from North mine, Broken Hill, New South Wales, Australia

Manganogrunerite
            from North mine, Broken Hill, New South Wales, Australia

Tan radial fibrous sprays.

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