Sterling Silver Blue John Medium Round Stone Ring. R610. This striking statement ring, part of our Heritage handmade jewellery collection features a highly polished round cabochon of genuine Blue John stone, sourced directly from Castleton, Derbyshire. The dazzling rare stone is framed within a simple, contemporary 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 of skilled craftsmen transform the natural Blue John stone into these stunning pieces of jewellery. You can find other matching Blue John jewellery and other Blue John rings online and in-store. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging. Dimensions 26mm stone.