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Harmotome On Quartz & Hematite

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CLB124102

Harmotome On Quartz & Hematite

Classic Locality

Description Tabs

Description
Locality: 
Juchem Quarry, Niederwörresbach, Herrstein, Birkenfeld, Rhineland-Palatinate, Germany
Class: 
Combination
Size Range: 
Small cabinet (7-10 cm)
Size: 
9.2 × 6.8 × 3.3 cm
Largest Crystal: 
1.20cm
Description

Very rich specimen with dozens of harmotome crystals on a piece of a hematite-bearing Quartz vug. Dozens of harmotome crystals up to 1.2 cm build a 'bridge' in the vug.

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

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

Hematite

Formula: 
Fe2O3
Strunz: 
4.CB.05
Crystal System: 
Trigonal
Hardness: 
5.0 - 6.0

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