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Manganogrunerite

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GND31256

Manganogrunerite

Description Tabs

Description
Locality: 
North Mine, Broken Hill, Yancowinna County, New South Wales, Australia
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.2 × 4.5 × 4.2 cm
Description

This fibrous amphibole mineral is a difficult and hard to get species from Broken Hill. The mineral forms groups of long brown bladed crystals up to 4 cm long in a quartz matrix. There is some minor associated galena with the quartz.

A good specimen for the species and the locality, that displays well in the cabinet.

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
Gondwana Minerals