18ct White Gold Blue John 0.34ct Diamond Double Row Octogon Shaped Necklace, P1551C. This sophisticated necklace features a stunning square cut Derbyshire Blue John gemstone that has been sourced directly from Castleton, Derbyshire. It is encased in an 18ct white gold double row octogen shaped setting that is set with 0.34cts of fine quality white diamonds which extend up the pendant bail, 65 diamonds in total.  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. Dimensions 25mm x 12mm, Blue John; 6mm x 6mm