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Harmotome & Calcite

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MSD851305

Harmotome & Calcite

Description Tabs

Description
Locality: 
Juchem Quarry, Niederwörresbach, Herrstein, Birkenfeld, Rhineland-Palatinate, Germany
Class: 
Mixed Specimens
Size Range: 
Thumbnail (1-3cm)
Size: 
1.8 × 1.5 × 1.5 cm
Weight: 
7.00gr
Description

White, well defined crystals of Harmotome are scattered on an orange, translucent Calcite. This is a typical combination from the "Wasserfall" region in the extensive Juchem Quarry.

I myself have been searching for minerals there for many decades and have made excellent finds. Unfortunately, mineral collectors - often through their own fault - were less and less welcome there, so that further finds can hardly be expected in the future.

Own find from the year 2012.

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