Blue john drop pendant silver necklace p384rthis exquisite necklace boasts a stunning oval shaped piece of cabochon rare blue john stone that has been sourced directly from treak cliff cavern in castleton the stone has been placed within a mesmerising sterling silver drop setting that hangs gracefully from the delicate 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