18ct white gold whitby jet 216ct diamond octagon necklace punq0000268 this elegant necklace features a stunning oval shaped bead of the finest whitby jet stone sourced directly from the north east coast of yorkshire the beautiful 18ct white gold octagon frame is pave set with dazzling 216 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 gemst