Silver blue john oval foxtail ring r858 this stunning statement ring is part of our foxtail collection and boasts astriking ovalcabochon 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 features woven sterling silverfoxtail detailing around the stone and down the shouldersand band all our blue john jewellery is designed and crafted within our very own workshops in ashbourne de