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Calcite On Prehnite

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PJM47950

Calcite On Prehnite

Description Tabs

Description
Locality: 
Prospect Quarry, Prospect, Cumberland County, New South Wales, Australia
Size Range: 
Miniature (4.5-7 cm)
Size: 
4 × 6.5 × 4.8 cm
Description

Crude calcite crystals are scattered around a cavity lined with botyroidal prehnite. The prehnite also has a number of hollow cats probably from dissolved laumontite

Mineral Data
What's on the rock

Calcite

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

Prehnite

Formula: 
Ca2Al2Si3O10(OH)2
Strunz: 
9.DP.20
Hardness: 
6.0 - 6.5
Streak: 
White
Type Locality: 
Karoo dolerites, Cradock, Chris Hani District, Eastern Cape Province, South Africa
Earthstones Australia

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