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Harmotome & Calcite

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CLB618270

Harmotome & Calcite

Classic Locality

Description Tabs

Description
Locality: 
Setz Quarry, Idar Oberstein, Hunsrück, Rhineland-Palatinate, Germany
Class: 
Combination
Size Range: 
Cabinet (10-18 cm)
Size: 
10.6 × 8.4 × 6 cm
Weight: 
562.00gr
Description

This is a very rich specimen, full of colorless harmotome crystals in a vug. A little brownish calcite crystal in one corner. Under magnification the harmotome crystals look a bit odd - like twinned along the  longitudinal axis. Some are multiple-tipped with a star-like top view. It's a bit difficult to photograph this.

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

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

Seller Information

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