Sterling Silver Whitby Jet 6mm Round Ribbed Necklace. P328. This pendant features a circular highly polished Whitby Jet gemstone that is surrounded by a ridge of sterling silver.  A simple and elegant pendant that shows off the natural beauty of the deep black Whitby Jet gemstone, perfect for every day wear. Set with a solid bail and presented on an 18 inch sterling silver chain.  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: 17mm x 9mm, Whitby Jet; 6mm x 6mm.