Sterling Silver Whitby Jet Shell Necklace. P3161. This pendant features an eye-catching piece of the finest Whitby Jet set into a beautifully hand-crafted sterling silver shell design. Sold complete with an 18 inch sterling silver chain that 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 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: 53mm x 32mm. Whitby Jet: 35mm x 27mm.