£0.00View All
(0) Shopping Cart
Currency
FORTHCOMING EVENTS

​​​​​​​​​​​​​​​​​​​​​​​​
​​​​​​​For details of forthcoming events please click on the 'Shows & Fairs' tab above.​​​​​

​​​​​​​​​​​​​​
​​​​​​​​​​​​​​​​
​​​​​​​​​​​​​​​​​​​

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​

BLUE JOHN - very fine polished piece - Castleton, Derbyshire

« back
Home > PREVIOUSLY SOLD ITEMS > PREVIOUSLY SOLD BRITISH MINERALS, ROCKS AND RELATED ITEMS


'BLUE JOHN' FLUORITE

A gemstone unique to Derbyshire

Treak Cliff, Castleton, Derbyshire


A very fine, polished piece of Blue John showing good banding. 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 4 centimetres
Weight: 238 grams

PRICE: £0.00
Sorry, this item has been sold or is out of stock
BLUE JOHN - very fine polished piece  -  Castleton, Derbyshire
BLUE JOHN - very fine polished piece  -  Castleton, Derbyshire BLUE JOHN - very fine polished piece  -  Castleton, Derbyshire BLUE JOHN - very fine polished piece  -  Castleton, Derbyshire BLUE JOHN - very fine polished piece  -  Castleton, Derbyshire