9ct Yellow Gold Blue John Gap 8mm Wedding Band Ring, R585. This Derbyshire Blue John and 9ct yellow gold ring has been expertly hand cut and crafted within our workshop. This design has been inspired by our Wedding collection and is a proven popular design. The rectangular shaped Blue John segments are set at 2mm gaps around the Gold band which is 8mm thick, this intricate design has a striking and smooth finish. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging.