Blue john rope edge port hole silver earrings e1621rthese stunning nautical themed drop earrings boast two round pieces of rare blue john stone that has been sourced directly from treak cliff cavern in castleton the stone is set within an unmissable sterling silver base that is detailed with exquisite twisted rope detailing to complete the porthole design the earrings hang gracefully from the lobe by the classic hook fasteningsrall our blue john jewellery is designed and crafted within our