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Harmotome

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PCZ222177

Harmotome

Description Tabs

Description
Locality: 
Whitesmith Mine, Strontian, Argyll, Scotland, United Kingdom
Class: 
Single Crystal
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.8 × 5.5 × 4.5 cm
Description

A good sized specimen with well-formed and lustrous white harmotome crystals to 1cm on matrix. This is a rare barium zeolite mineral and the Strontian mines have produced some of the world's best specimens.

Mineral Data
What's on the rock

Harmotome

Formula: 
(Ba0.5,Ca0.5,K,Na)5[Al5Si11O32] ·12H2O
Strunz: 
9.GC.10
Crystal System: 
Monoclinic
Hardness: 
4.0 - 5.0
Streak: 
White
Type Locality: 
St Andreasberg, St Andreasberg District, Harz, Lower Saxony, Germany
Peter Crozier Minerals