C w sellors necklace cross blue john and silver p1866rthis exquisite necklace boasts four unmissable cabochon pieces of blue john stone that has been directly sourced from the derbyshire blue john cavern in castleton the stone is set within this enchanting sterling silver cross design that hangs gracefully from a delicate 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 where a team