Sterling silver blue john cushion foxtail stud earrings e1840 these unique earrings feature cushionsof semi precious gemstone blue john the stones are framed in intricately woven sterling silver foxtail chain andcompleted with post and butterfly fastenings for secure and easy wear all our blue john jewellery is designed and crafted within our very own workshops in ashbourne derbyshire where a team of skilled craftsmen turn the raw blue john stone into these stunning pieces of jewellery y