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Cowlesite & Calcite

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ZLT155744

Cowlesite & Calcite

Description Tabs

Description
Locality: 
Ballyclare, County Antrim, Northern Ireland, United Kingdom
Size Range: 
Miniature (4.5-7 cm)
Size: 
2 × 4.5 × 3 cm
Description

Basaltic rock sample with a cavity of 15 mm lined with cowlesite and some small calcite. From Harry Foy (1977).

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

Calcite

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

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