Sterling Silver Blue John Framed Heart Necklace. P1554. This romantic necklace features a beautiful heart shaped cabochon of the finest Blue John stone, sourced directly from Castleton, Derbyshire. The gemstone is framed in sterling silver and highly polished for a smooth, contemporary finish. The pendant hangs gracefully from an 18 inch sterling silver chain with a classic bolt ring clasp. 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: 16mm x 19mm.