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Harmotome

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MEX668174

Harmotome

Classic Locality

Description Tabs

Description
Locality: 
Bellsgrove Mine, Strontian, Highland, Scotland, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.4 × 3.2 × 2.9 cm
Weight: 
26.00gr
Description

Well terminated specimen with few bigger harmotom crystals and a lot of nearly colorless small crystals. In the middle of specimen is tabular baryte.

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