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Aragonite On Ferrocalcite

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PJM54484

Aragonite On Ferrocalcite

Description Tabs

Description
Locality: 
Boral Quarry, Bundoora, Whittlesea, Victoria, Australia
Size Range: 
Small cabinet (7-10 cm)
Size: 
5.4 × 7.3 × 6.4 cm
Description

A shallow cavity in basalt, lined with tan to brown coloured calcite var ferrocalcite and then topped with translucent white sprays of aragonite. An attractive specimen alas not without some bruising.

Mineral Data
What's on the rock

Aragonite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.15
Crystal System: 
Hexagonal
Hardness: 
3.5 - 4.0
Type Locality: 
Gallo river, Molina de Aragón, Guadalajara, Castile-La Mancha, Spain

Ferrocalcite

Synonym Of: 

Ferroan Calcite

Formula: 
(Ca,Fe)CO3
Hardness: 
0.0

Siderite

Formula: 
FeCO3
Strunz: 
5.AB.05
Hardness: 
3.5 - 4.5
Earthstones Australia

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