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BLUE JOHN - natural unpolished piece - Castleton, Derbyshire

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Home > MINERALS > MINERALS FROM BRITAIN AND IRELAND FOR COLLECTORS > NORTHERN AND CENTRAL ENGLAND

  

'BLUE JOHN' FLUORITE

 Natural unpolished piece
 
Treak Cliff, Castleton, Derbyshire

A deep purple piece of fluorite, with some cubic crystals visible. It is mostly opaque purple fluorite with a little limestone.

Blue John is a variety of the mineral fluorite. It is only found in the vicinity of Treak Cliff, near Castleton in Derbyshire. It is typically banded but this piece is solid purple colour. Blue John has been mined for hundreds of years and made into jewelry, bowls, goblets, vases, and numerous other decorative items that are now prized throughout the world.

The origin of the name Blue John is not clear.  It is likely that it was a local name given to the stone by the Derbyshire lead miners who already knew the zinc mineral sphalerite by the nickname ‘Black Jack’. 

Click on a picture for a larger image


Size: 9 x 6 x 4 centimetres
Weight: 271 grams

PRICE: £16.00
BLUE JOHN  - natural unpolished piece  - Castleton, Derbyshire
BLUE JOHN  - natural unpolished piece  - Castleton, Derbyshire BLUE JOHN  - natural unpolished piece  - Castleton, Derbyshire BLUE JOHN  - natural unpolished piece  - Castleton, Derbyshire BLUE JOHN  - natural unpolished piece  - Castleton, Derbyshire