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Grunerite & Magnetite

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RMM86646

Grunerite & Magnetite

Description Tabs

Description
Locality: 
Helen-MacLeod Mines, McMurray & Chabanel Townships, Algoma District, Ontario, Canada
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 2.5 × 2 cm
Largest Crystal: 
2.00cm
Description

Crystals of grunerite in a matrix of magnetite and quartz from a 2009 find.

Mineral Data
What's on the rock

Grunerite

Formula: 
☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2
Strunz: 
9.DE.05
Hardness: 
5.0 - 6.0
Colour: 
nd
Streak: 
nd
Type Locality: 
Sarvengude ravine, Collobrières, Var, Provence-Alpes-Côte d'Azur, France...

Magnetite

Formula: 
Fe2+Fe3+2O4
Strunz: 
4.BB.05
Crystal System: 
Isometric
Hardness: 
5.5 - 6.5
Streak: 
Black

Seller Information

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