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Stilbite On Prehnite

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PJM84869

Stilbite On Prehnite

Ex J & S Mommers Collection.

Description Tabs

Description
Locality: 
Prospect Quarry, Prospect, Cumberland County, New South Wales, Australia
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.8 × 2.7 × 2.2 cm
Description

Three intergrown creme coloured stilbite wheatsheaf clusters backed by botyroidal green prehnite from the long defunct Prospect Quarry in the western suburbs of Sydney.

Mineral Data
What's on the rock

Stilbite

Synonym Of: 

Stilbite-Ca

Formula: 
NaCa4[Al9Si27O72]·nH2O
Strunz: 
9.GE.10
Hardness: 
3.5 - 4.0

Stilbite-Na

Formula: 
(Na,Ca,K)6-7[Al8Si28O72]·nH2O
Strunz: 
9.GE.10
Hardness: 
3.5 - 4.0
Hardness: 
3.5 - 4
Colour: 
White
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

Seller Information

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