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Harmotome

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CR116993

Harmotome

Description Tabs

Description
Locality: 
Abendröthe Mine, St Andreasberg, Goslar, Lower Saxony, Germany
Size Range: 
Museum (18cm plus)
Size: 
18 × 8 × 6 cm
Largest Crystal: 
1.00cm
Description

This is a very good and rich harmotome specimen from the very fmous St. Andreasberg mining area.

Lustrous white to smoky-white harmotome crystals up to 10 mm all over the surface of the specimen.

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