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Calcite On Quartz On Manganoan Calcite

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PJM43580

Calcite On Quartz On Manganoan Calcite

Description Tabs

Description
Locality: 
Zinc Corporation Mine, Broken Hill, Yancowinna County, New South Wales, Australia
Size Range: 
Museum (18cm plus)
Size: 
4.2 × 18.7 × 8.5 cm
Description

Small scalahedrons of calcite ae scattered across a druzy quartz matrix in a cavity located on a pinkish tan coloured manganocalcite cleavage from the Zinc Corp. Mine at Broken Hill.

On initial examination the calcite can easily be mistaken for pyrite druze because of the colour, under magnification the calcite crystals are weird, they are a dark grayish colour with a silver coloured turtoise shell patterning.

Mineral Data
What's on the rock

Calcite

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

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

Manganoan Calcite

Variety Of: 

Calcite

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

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