9ct yellow gold blue john stone rose ring r873 this feminine detailed ring has been created using the finest quality hand carved blue john which is sourced directly from the treak cliff cavern in castleton the circular gemstone is surrounded by a swirling rose design of 9ct yellow gold that catches the light beautifully the perfect gift for someone special all our blue johnjewellery is designed and crafted within our very own workshops in derbyshire where a team of skilled craftsmen tur