Sterling Silver Blue John Oval Lattice Ring. R146. This feminine ring is part of our handmade Heritage jewellery collection and features a hand carved cabochon of natural Blue John, sourced directly from Castleton, Derbyshire. The highly polished gemstone is framed within an exquisite sterling silver design completed with a classic 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 stunning 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: Cabochon 6mm x 4mm.