9ct Yellow Gold Whitby Jet Rhombus Necklace. P084. This elegant, contemporary necklace features a hand carved cabochon of the finest Whitby Jet stone, sourced directly from the north east coast of Yorkshire. The gemstone is polished to perfection for a smooth finish. Sold complete with an 18 inch 9ct yellow gold chain which fastens with a classic bolt ring style clasp. All our Whitby Jet jewellery is designed and crafted within our very own workshops in Ashbourne, Derbyshire where a team of skilled craftsmen transform natural pieces of Whitby Jet into these stylish pieces of jewellery. You can find other matching Whitby Jet jewellery on our website. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging.  Dimensions: 21mm x 19mm, Whitby Jet 16mm x 16mm.