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Harmotome

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Harmotome

Classic Locality

Description Tabs

Description
Locality: 
Bellsgrove Mine, Strontian, Highland, Scotland, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.5 × 4.1 × 2.4 cm
Description

Beautiful, multifaced crystals of monoclinic zeolite harmotome on typically matrix. The well developed harmotome is highly lustrous, mirror bright and excellent terminated. On some faces you can see a nice striation. A good specimen from one of the most classic localties of this species.

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
Wendel Minerals

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