18ct white gold whitby jet 007ct diamond ring r638 this exquisite ring features a stunning cushion shaped cabochon of the finest whitby jet stone sourced directly from the north east coast of yorkshire thebeautiful18ct white gold frame is embellished by dazzling 007 carats of brilliant cut diamonds at c w sellors we have an expert team of gemstone and diamond specialists who handpick and grade each jewel to meet our high standards and a team oftalented in house designers who combine