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Harmotome

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CR817947

Harmotome

Classic Locality

Description Tabs

Description
Locality: 
Bellsgrove Mine, Strontian, Highland, Scotland, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.8 × 4.5 × 6 cm
Largest Crystal: 
1.50cm
Weight: 
260.00gr
Description

This is a fantastic old harmotome specimen from Scotland.

Lustrous and sharp harmotome crystals up to 15 mm on matrix.

Pristine old specimen - Ex Armin Wendland collection.

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