Blue john dinky oblong 9ct yellow gold stud earrings e284rthese simple and delicate stud earrings boast two exquisite pieces of cabochon blue john stone that have been sourced directly from treak cliff cavern in castletonrthe stone is placed within elegant 9ct yellow gold settings which are completed by post and butterflyfastenings for easy wearrall our blue john jewellery is designed and crafted within our very own workshops in ashbourne derbyshire where a team of skilled craftsmen turn th