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Braunite & Tephroite

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SHS193039

Braunite & Tephroite

Description Tabs

Description
Locality: 
Långban, Filipstad, Värmland County, Sweden
Class: 
Single Crystal
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.7 × 4.2 × 3.3 cm
Description

 Nice braunite in tephroite

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

Tephroite

Formula: 
Mn2+2SiO4
Strunz: 
9.AC.05
Crystal System: 
Orthorhombic Forms short prismatic crystals.
Hardness: 
6.0
Streak: 
Pale gray
Type Locality: 
Sterling Mine, Sterling Hill, Ogdensburg, Franklin Mining District, Sussex Co., New Jersey, USA