BlueJohn-Cavern.co.uk provides Cavern tours and Blue John craft supplies
Title
Welcome To The World Famous Blue John Cavern And The Original Blue John Craft Shop
Description
Blue-John is a unique fluor spar found only at Castleton. The mineral is found in veins in the limestone deep within the Blue John Cavern where it has been mined for centuries.
Thought to have been named "Blue John" by John Kirk and Joseph Hall who worked the mines in the 18th Century, it is the rarest natural formation in the British Isles.
Further evidence of the Romans love for Blue John comes from Pompeii where two vases were unearthed during excavations of the city.
