Sterling Silver Blue John Glass Square Locket Necklace P3296 This feminine locket features a cabochon of rare Blue John stone, sourced directly from the Blue John Cavern in Castleton. The stone is framed within sterling silver and the locket opens to reveal a frame perfect for a picture. Sold complete with an 18 inch sterling silver chain. 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 on our website and in store. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging.  Dimensions: 17mm.