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Fluorite

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PCZ520618

Fluorite

Description Tabs

Description
Locality: 
Old Tor Mine, Castleton, Derbyshire, United Kingdom
Class: 
Single Crystal
Size Range: 
Thumbnail (1-3cm)
Size: 
2.9 × 2.1 × 2 cm
Largest Crystal: 
2.90cm
Description

A very nice old time terminated blue-john fluorite specimen from the famous Old Tor Mine, Derbyshire, collected sometime in the early 1950's. Old Tor mine is one of the smaller, lesser known and much less frequently offered localities for this world famous, and much sought after, form of fluorite. 

The specimen comprises of a deep blue-purple cleaved cube with lustrous stepped faces and sharp edges. Cleaved surfaces show colour variation and banding in section. There is a little calcite to one edge. 

A good Specimen and increasingly hard to find in this condition. 

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
Peter Crozier Minerals