18ct Rose Gold Whitby Jet Heritage Round Necklace. P018. This classic necklace is part of our Heritage handmade jewellery collection and features a stunning cabochon of fine Whitby Jet stone which has been sourced directly from the North East coast of Yorkshire. The gemstone is simply and exquisitely set in 18ct Rose gold. Sold complete with an 18 inch 18ct Rose gold chain which fastens securely with a 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 stunning 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: Whitby Jet: 15mm x 15mm.