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BLUE JOHN - polished piece - Castleton, Derbyshire

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Home > MINERALS > PRECIOUS AND SEMI-PRECIOUS GEMSTONES

  

'BLUE JOHN' FLUORITE

 A gemstone unique to Derbyshire
 
Treak Cliff, Castleton, Derbyshire

 
A nice polished piece of Blue John. It has been highly polished on all sides except one where the natural crystals can be seen.

Blue John is a banded variety of the mineral fluorite.  It is only found in the vicinity of Treak Cliff, near Castleton in Derbyshire.  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: 7 x 6 x 3.5 centimetres
Weight: 331 grams

PRICE: £55.00
BLUE JOHN  - polished piece  -  Castleton, Derbyshire
BLUE JOHN  - polished piece  -  Castleton, Derbyshire BLUE JOHN  - polished piece  -  Castleton, Derbyshire BLUE JOHN  - polished piece  -  Castleton, Derbyshire BLUE JOHN  - polished piece  -  Castleton, Derbyshire