Blue john ring framed marquise silver r497 this simple and sophisticated ring is part of our heritage handmade jewellery collection and boasts a stunning marquise shaped piece ofblue john stone that hasbeen sourced directly from treak cliff cavern in castletonthe stone is framed within an exquisite sterling silver setting and completed with a classic sterling silver band all our blue john jewellery is designed and crafted within our very own workshops in ashbourne derbyshire where a team