Blue john necklace long white pearl e1282rthis stunning and sophisticated necklace boasts several round cabochon pieces of rare blue john stone that has been directly sourced from treak cliff cavern in castleton the stones have been paired with exquisite pearls set on a sterling silver chainrall our blue john jewellery is designed and crafted within our very own workshops in ashbourne derbyshire where a team of skilled craftsmen turn the raw blue john stone into these stunning pieces of jew