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Laumontite On Stilbite & Chlorite

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PJM142211

Laumontite On Stilbite & Chlorite

Description Tabs

Description
Locality: 
Arkaroola Bore, Arkaroola Region, Flinders Ranges, South Australia, Australia
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 2.2 × 2.1 cm
Description

Snow white acicular laumontite on a matrix of dark orange stilbite crystals and masses of dark green chlorite

Mineral Data
What's on the rock

Laumontite

Formula: 
CaAl2Si4O12·4H2O
Strunz: 
9.GB.10
Hardness: 
3.5 - 4.0
Streak: 
White
Type Locality: 
Huelgoat (Locmaria-Berrien), Finistère, Brittany, France

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

Chlorite

Synonym Of: 

Chlorite Group

Group Parent: 
Chlorite
Crystal System: 
Monoclinic
Hardness: 
2 - 2.5
Colour: 
Green, Grey, Brown
Streak: 
colourless
Earthstones Australia

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