Sterling Silver Blue John Gap 8mm Wedding Band Ring, R585. This Derbyshire Blue John and sterling silver 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 gemstone segments are set at 2mm gaps around the Silver 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.