18ct Yellow Gold Blue John Heart Link Disc Chain Necklace, N746. This on trend 18ct yellow gold chain necklace features petite discs embellished with heart shaped fine Blue John stones that have been sourced directly from the North East coast of Yorkshire.  All our Blue John jewellery is designed and crafted within our very own workshops in Derbyshire where a team of skilled craftsmen transform the natural Jet into these stunning pieces of jewellery. You can find other matching Blue John jewellery on our website and in store. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging.  Dimensions: 38 inches.