18ct White Gold Blue John 0.08ct Diamond Oval Necklace, P3324. This timeless 18ct white gold necklace features an oval shaped cabochon of fine Blue John, that has been sourced directly from Castleton, Derbyshire. The intensity of the Blue John is accentuated perfectly by a sparkling halo of brilliant cut diamonds, totalling 0.08cts. Designed perfectly for everyday wear, this gemstone set pendant is completed with a secure 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.