Blue john curved oblong drop 9ct yellow gold earrings e555rthese mesmerising drop earrings boast a wave of cabochon blue john stone that has been directly sourced from treak cliff cavern in castleton the stone is placed within delicate 9ct yellow gold oblong drop settings which are completed by classic post and butterfly fastenings 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 t