Blue John is a variety of fluorite found only in the beautiful Derbyshire Peak District around the town of Castleton where it is mined and nowhere else in the world, making it unique . This material has been treated in pine resin to stabilise it.
The 18ct Freeform Blue John Cabochon is far and away, one of our most popular items. People can't seem to get enough of it.
Inventory Last Updated: Jun 17, 2021