Sterling Silver Blue John Framed Marquise Ring. R497. This striking ring is part of our handmade Heritage collection and features a hand carved cabochon of the finest Blue John stone which has been sourced locally from Castleton, Derbyshire. The gemstone is framed in a highly polished sterling silver setting, creating a beautifully smooth finish. 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 of skilled craftsmen transform natural pieces of Blue John into these stylish pieces of jewellery. You can find other matching Blue John jewellery on our website. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging. Dimensions: 20mm x 12mm.