Blue john silver and marcasite edge bead stud earrings e1635rthese simple and stylish stud earrings boast two round pieces 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 has been embellished by eight marcasite stones around the edge creating an unmissable sparkle the earrings are completed by classic post and butterfly fastenings for easy wearrall our blue john jewellery is des