18ct Yellow Gold Blue John Round Necklace, PUNQ0005394. This simple pendant features a beautiful hand Blue John gemstone, which has been sourced directly from Castleton, Derbyshire. The gemstone is framed in a elegant 18ct yellow gold setting and highly polished for a smooth, contemporary finish. Sold complete with an 18 inch 18ct yellow gold chain that 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.