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Fluorite

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PCZ520624

Fluorite

Description Tabs

Description
Locality: 
Windy Knoll Quarry, Castleton, Derbyshire, United Kingdom
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 3.2 × 3 cm
Description

A nice old time terminated blue-john fluorite specimen from Windy Knoll Cavern, Castleton , Derbyshire, collected sometime in the early 1950's. This specimen is one of only a handful recovered from a very rare and now inaccessible locality. 

It comprises of a translucent cleaved cubes with slightly frosted, etched faces with stepped faces and sharp edges. The faces specked brownish inclusions of probably pyrite. The cubes appear yellowish but when viewed on edge show a Purple coloration zone in the outer layers of the crystals. 

Great condition, detachment damage only. 

 

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
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