Blue john cushion foxtail silver ring r848rthis stunning statement ring boasts an unmissable cabochon piece of blue john stone that has been directly sourced from treak cliff cavern in castleton the stone is set within a sterling silver base that showcases a striking foxtail chain that surrounds the stone and flows down the shoulders of the piecerall our blue john jewellery is designed and crafted within our very own workshops in ashbourne derbyshire where a team of skilled craftsmen turn t