18ct white gold whitby jet 013ct diamond cushion necklace p2999 this exquisite necklace features a stunning cushion shaped cabochon of the finest whitby jet stone sourced directly from the north east coast of yorkshire the beautiful 18ct white gold frame is embellished by dazzling 013 carats of brilliant cut diamonds the pendant hangs gracefully from a fluid 18 carat white gold chain complete with a classic bolt ring clasp for easy wear at c w sellors we have an expert team of gemstone