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Fluorite Arsenopyrite & Muscovite

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MGR1055037

Description Tabs

Description
Locality: 
Yaogangxian Mine, Hunan Province, China (Peoples Republic)
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
11.6 × 7.8 × 6.8 cm
Description

Perfectly placed crystal of cubic fluorite on muscovite matrix from China. It has a size of 37 mm on the edges and shows a fantastic transparence. The colour fades from slightly blueish to greenish with also some purple areas. Cherry on the cacke is the intergrown, golden lustrous crystal of arsenopyrite which is attached to the side of the fluorite.

Mineral Data
What's on the rock

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

Arsenopyrite

Formula: 
FeAsS
Strunz: 
2.EB.20
Crystal System: 
Monoclinic
Hardness: 
5.5 - 6.0

Muscovite

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