Blue john pendant oval double sided silver p150rthis striking statement necklace boasts an unmissable cabochon oval shaped piece of rare blue john stone that has been sourced directly from treak cliff cavern in castleton the stone is placed within an exquisite sterling silver setting that hangs gracefully from a delicate sterling silver chain complete with a classic bolt ring clasprall our blue john jewellery is designed and crafted within our very own workshops in ashbourne derbyshire wher