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Prehnite

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PJM36764

Prehnite

Description Tabs

Description
Locality: 
Propect Quarry, Sydney, New South Wales, Australia
Size Range: 
Miniature (4.5-7 cm)
Size: 
1.9 × 4.2 × 4.9 cm
Description

A good botyroidal prehnite from metropolitan Sydney's western suburbs, from a former council road metal quarry that has been closed to collecting for about thirty or so years.

This specimen is part of a collection I have been offering that was acquired from a retired council worker more than twenty years ago. this specimen does not photograph well and is much better in person.

The reverse side shows some interesting desolution where an unknown bladed mineral had hosted this prehnite specimen

Mineral Data
What's on the rock

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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