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Lévyne With Offretite

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PCZ644627

Lévyne With Offretite

Description Tabs

Description
Locality: 
Dungonell Dam, Cargan, County Antrim, Northern Ireland, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.5 × 4 × 4 cm
Description

A basalt matrix with two vugs up to 1.5 cm across containing levyne crystals coated with offretite. A nice example of the association from this locality.

Mineral Data
What's on the rock

Lévyne

Strunz: 
77.1.2.8
Hardness: 
4 - 4½
Colour: 
White
Streak: 
White

Offretite

Formula: 
KCaMgAl5Si13O36·16H2O or near
Strunz: 
9.GD.25
Hardness: 
4.0 - 4.5
Type Locality: 
Mont Semiol (Mont Semiouse; Mont Simiouse), Châtelneuf, Saint-Georges-en-Couzan, Loire, Rhône-Alpes, France
Peter Crozier Minerals