18ct yellow gold whitby jet 015ct diamond oval centred ring r601 this statement ring features a stunning oval shaped cabochon of the finest whitby jet stone sourced directly from the north east coast of yorkshire the beautiful 18ct yellow gold frame is embellished by dazzling 015 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 of talented in house designers