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Tephroite & Hausmannite

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RFJ1169991

Description Tabs

Description
Locality: 
Hamayokokawa Mine, Kamiina District, Nagano Prefecture, Honshu Island, Japan
Class: 
Massive/Crystalline
Size Range: 
Small miniature (3-4.5 cm)
Size: 
2.3 × 4.1 × 1.9 cm
Description

Nice sample of Banded Manganese ore, there is grey greenish Tephroite and dark brown Hausmannite the light band is Calcite with a little Rhodonite in it.

Mineral Data
What's on the rock

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

Hausmannite

Formula: 
Mn2+Mn3+2O4
Strunz: 
4.BB.10
Hardness: 
5.5
Type Locality: 
Oehrenstock (Öhrenstock), Langewiesen, Ilmenau District, Thuringian Forest, Thuringia, Germany

Current price

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10
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Start 06 Mar 18:00
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East-Asia, 8 Euro registered
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Australia, 13 Euro registered
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