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Hausmannite With Calcite

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Hausmannite With Calcite

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Description
Locality: 
Wessels Mine, Hotazel, Kalahari, Northern Cape Province, South Africa
Class: 
Combination
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 4.7 × 1.3 cm
Weight: 
57.78gr
Description

Calcite on hausmannite on a thin base plate fragment of sedimentary ironstone. The hausmannite covers the base plate in a layer of interconnected pyramidal crystals. The calcite has a semi-matt lustre on close to clear crystals that have a pale grey presence.

Mineral Data
What's on the rock

Hausmannite

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

Calcite

Polymorph of: 
Aragonite and Vaterite
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

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