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Blue John

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NBM220378

Blue John

Description Tabs

Description
Locality: 
Castleton, Derbyshire, United Kingdom
Size Range: 
Miniature (4.5-7 cm)
Size: 
3 × 5 × 4 cm
Largest Crystal: 
2.00cm
Description

Deep purple so-called Blue John fluorite from Castleton.

Mineral Data
What's on the rock

Blue John

Variety Of: 

Fluorite

Formula: 
CaF2
Strunz: 
3.AB.25
Hardness: 
4.0

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