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Harmotome

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PCZ559683

Harmotome

Description Tabs

Description
Locality: 
Whitesmith Mine, Strontian, Argyll, Scotland, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.3 × 3.8 × 2.5 cm
Description

A good sized specimen with well-formed and lustrous white harmotome crystals to 0.8cm on matrix. This is one of the rarest zeolite minerals and the Strontian mines have produced some of the world's best specimens. Lovely example from the locality.

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
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