Sterling Silver Blue John Open Petal Flower Neckace. P2091. At the centre of this feminine pendant is a stunning cabochon of the finest Blue John stone which has been sourced directly from Castleton, Derbyshire. The gemstone is framed by an sterling silver flower design with open petal detailing. Sold complete with an 18 inch sterling silver chain which fastens with a classic bolt ring style 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.