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Stilbite & Calcite

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PJM41083

Stilbite & Calcite

Ex M Brown (Kerang) Collection #444

Description Tabs

Description
Locality: 
Lake Cooper Quarry, Victoria, Australia
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.5 × 4.3 × 1.4 cm
Description

A plate of micro stilbite crystals with twinned calcite from the Lake Cooper Quarry in the Campaspe Shire in central Victoria. These stilbites came from a brecciated fault at the western end of the quarry.

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

Calcite

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

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