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Manganoan Calcite

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Manganoan Calcite

Description Tabs

Description
Locality: 
Broken Hill, New South Wales, Australia
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 1.8 × 2 cm
Description

This fascinating tree like growth of manganoan calcite* is coated by a brown mangaganese / iron mineral, which may be manganoan hisingerite* or popularly known as 'sturtite'. A superb and unusual specimen that is undamaged.

*One has to be aware of the possible variation in composition of all these species which can grade into other minerals. This applies in this case.

Mineral Data
What's on the rock

Manganoan Calcite

Variety Of: 

Calcite

Formula: 
CaCO3
Strunz: 
5.AB.05
Hardness: 
3.0
Formula: 
(Ca,Mn)CO3
Hardness: 
0.0
Gondwana Minerals