Blue john foxtail silver stud earrings e1455rthese sophisticated stud earrings are part of our foxtail collection and boast two stunning round cabochon pieces of rare blue john stone that has been sourced directly from treak cliff cavern in castleton the stone is set within an exquisite sterling silver mount and surrounded by the unmissable foxtail chain detailing the earrings are completed by classic post and butterfly fasteningsrall our blue john jewellery is designed and crafted within