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Apophyllite On Prehnite

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PJM99627

Apophyllite On Prehnite

Description Tabs

Description
Locality: 
Prospect Quarry, Sydney District, New South Wales, Australia
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.3 × 3.1 × 1.9 cm
Largest Crystal: 
1.70cm
Description

Collected in the 1960's, translucent blocky white apophyllite crystals to 1.7cm on a matrix of pale green prehnite crystals. This locale in the outer western suburbs of Sydney has been closed to collecting for decades.

Mineral Data
What's on the rock

Apophyllite

Synonym Of: 

Fluorapophyllite-(K)

Formula: 
KCa4(Si8O20)(F,OH)·8H2O
Strunz: 
9.EA.15
Hardness: 
4.5 - 5.0

Fluorapophyllite-(Na)

Formula: 
NaCa4(Si8O20)F·8H2O
Strunz: 
9.EA.15
Hardness: 
4.0 - 5.0

Hydroxyapophyllite-(K)

Formula: 
KCa4(Si8O20)(OH,F)·8H2O
Strunz: 
9.EA.15
Hardness: 
4.0 - 5.0

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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