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Harmotome

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CR24489

Harmotome

Type Locality

Description Tabs

Description
Locality: 
St Andreasberg District, Lower Saxony, Germany
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.8 × 6 × 3.5 cm
Description

Hundreds of white, twinned harmotome crystals on thin matrix.

Excellent specimen from the type 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