Treak Cliff Cavern, a genuine wonder of the Peak District, is situated on Treak Cliff Hill, Castleton. It is the only place in the world where Blue John Stone naturally occurs.
The mineral Blue John Stone is a unique banded form of Fluorspar. It is believed it was originally given its name from the French "bleu et jaune" the "blue and yellow" stone. It was mined in the eighteenth century with the Derbyshire folk coining the name of Blue John Stone.
Treak Cliff Cavern continues to mine, process and manufacture ornamental items and jewellery from Blue John Stone today.
As well as Blue John Stone we also have some of the finest stalactites in the Peak District, which can be viewed in our 'Aladdin's Cave', 'Fairy Grotto' and 'Dreamcave' chambers.