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Chalcopyrite & Fluorite On Muscovite

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PMN756611

Chalcopyrite & Fluorite On Muscovite

Description Tabs

Description
Locality: 
Bairendaba, Hexigten Banner, Ulanhad League, Inner Mongolia, China (Peoples Republic)
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
3 × 8 × 5 cm
Largest Crystal: 
2.50cm
Weight: 
177.00gr
Description

Colourful combination of the Fluorite that got named 'window' fluorite as the purple outer layer covering the inner raspberry coloured 1st generation show little windows, allowing a peek into the interior, one of the crystal on the side here is actually a blue outer layer. It forms nice contrast with the bright brassy chalcopyrite and the pale green muscovite. No damage to report.

Mineral Data
What's on the rock

Chalcopyrite

Formula: 
CuFeS2
Strunz: 
2.CB.10a
Crystal System: 
Tetragonal
Hardness: 
3.5 - 4.0

Fluorite

Formula: 
CaF2
Strunz: 
3.AB.25
Crystal System: 
Isometric
Hardness: 
4.0
Streak: 
White
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

Muscovite

Formula: 
KAl2(AlSi3O10)(OH)2
Strunz: 
9.EC.15
Hardness: 
2.5
Streak: 
White