18ct White Gold Blue John 0.51ct Diamond Cushion Necklace, P2667. This elegant pendant boasts a stunning cabochon cushion piece of rare Blue John stone that has been sourced directly from Castleton, Derbyshire. The stone is placed within an exquisite 18ct white gold setting and surrounded by brilliant cut diamonds, totalling 0.51cts, giving the piece a sophisticated sparkle. The pendant hangs from a fluid 18 inch long 18ct white gold 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 and other Blue John necklaces on our website. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging.