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Fluorite Chalcopyrite & Baryte

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CLB508767

Fluorite Chalcopyrite & Baryte

ex collection Dr. E. Miller, Leipzig
Classic Locality

Description Tabs

Description
Locality: 
Kälberstall Mine, Frohnau, Erzgebirge, Saxony, Germany
Class: 
Combination
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.8 × 6.7 × 4.7 cm
Description

The 'Kälberstall' is an ancient mine, first worked on in 1660. In 1724 it was combined with the 'Haselstaude mine'. Similar fluorite specimen appear on Mindat under the locality 'Hölzerne Staude und Gottes Vertrauen Mine, Schottenberg, Frohnau'. Not knowing the region's complete mining history I can only guess both were later combined with those new mines.

However, the specimen shows a nice, fine green color, a lot of intertwined crystals and some nice chalcopyrite crystals on top. The baryte crystals are unfortunately damaged and there is a ding at the side of the fluorite. Not too bad for an unusual, historic specimen.

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

Chalcopyrite

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

Baryte

Formula: 
BaSO4
Strunz: 
7.AD.35
Hardness: 
3.0 - 3.5
Streak: 
White

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