Sterling Silver Whitby Jet 4mm Bead Chain Link Necklace, N952_18. This Whitby Jet and sterling silver C W Sellors necklace features 66, 4mm sized Whitby Jet gemstones, set on a delicate sterling silver chain link necklace.  A perfect gift for someone special. Length: 18 inches. All our Whitby Jet jewellery is designed and crafted within our very own workshop, 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.