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Braunite

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NST621275

Braunite

Description Tabs

Description
Locality: 
Fuchs Quarry, Hartkoppe, Sailauf, Lower Franconia, Bavaria, Germany
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.5 × 5 × 4 cm
Description

A rich example of octahedral braunite crystals from Fuchs rhyolite quarry at Sailauf.

Mineral Data
What's on the rock

Braunite

Formula: 
Mn2+Mn3+6(SiO4)O8
Strunz: 
9.AG.05
Hardness: 
6.0 - 6.5
Streak: 
Black
Type Locality: 
Oehrenstock (Öhrenstock), Langewiesen, Ilmenau District, Thuringian Forest, Thuringia, Germany