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Cowlesite & Chabazite

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CSW198129

Cowlesite & Chabazite

Ex Harry J. Foy Collection

Description Tabs

Description
Locality: 
Ballygruby Quarry, Magherafelt, County Londonderry, Northern Ireland, United Kingdom
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.2 × 4 × 2.3 cm
Description

Basalt matrix with amygdales containing light grey spherules of micro cowlesite crystals. Other amygdales contain chabazite crystals and saponite. There is also an unusual network of amygdales lined with light blue saponite and colourless radial cowlesite.

Mineral Data
What's on the rock

Cowlesite

Formula: 
CaAl2Si3O10·6H2O
Strunz: 
9.GG.05
Crystal System: 
Orthorhombic
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Neer Road, Goble, Columbia Co., Oregon, USA

Chabazite

Synonym Of: 

Chabazite-Ca

Formula: 
(Ca,K2,Na2)2[Al2Si4O12]2·12H2O
Strunz: 
9.GD.10
Hardness: 
4.0 - 5.0

Chabazite-K

Formula: 
(K2,Ca,Na2,Sr,Mg)2[Al2Si4O12]2·12H2O
Strunz: 
9.GD.10
Hardness: 
4.0

Chabazite-Mg

Formula: 
(Mg0.7K0.5Ca0.5Na0.1)[Al3Si9O24]·10H2O
Strunz: 
9.GD.10
Hardness: 
4.0 - 0.0

Chabazite-Na

Formula: 
(Na2,K2,Ca,Sr,Mg)2[Al2Si4O12]2·12H2O
Strunz: 
9.GD.10
Hardness: 
4.0

Chabazite-Sr

Formula: 
Sr2[Al2Si4O12]2·12H2O
Strunz: 
9.GD.10
Hardness: 
4.0 - 4.5

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