Sterling Silver Blue John Framed Marquise Necklace, P861. Part of our handmade Heritage collection, this elegant necklace features a hand carved cabochon of the finest Blue John stone which has been sourced directly from Castleton, Derbyshire. The striking gemstone is framed in sterling silver and polished to a high shine creating a beautifully smooth finish. 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 or in stores. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging. Dimensions: 19mm x 12mm.