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Blue John

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PCZ653607

Blue John

Description Tabs

Description
Locality: 
Treak Cliff Cavern, Castleton, Derbyshire, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.5 × 5 × 2.5 cm
Description

Blue John is the world famous massive variety of fluorite that is now very rare and commands high prices for the objects into which it is fashioned. Even rarer is Blue John specimens that show free crystals. This specimen comprises of numerous typical deep purple cubes. An unusual and rare fluorite from a famous location.

Mineral Data
What's on the rock

Blue John

Variety Of: 

Fluorite

Formula: 
CaF2
Strunz: 
3.AB.25
Hardness: 
4.0
Peter Crozier Minerals