Sterling Silver Blue John Round Split Shoulder Ring. R029. This elegant ring, part of our handmade Heritage collection, features a beautiful round cabochon of rare Blue John stone, sourced directly from Castleton, Derbyshire. The gemstone is set within a highly polished sterling silver base. Completed with split shoulder detailing. 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: Blue John: 5mm.