Sterling Silver Whitby Jet Marcasite Heart Locket Necklace. P2151. This vintage style locket features a highly polished cabochon of genuine Whitby Jet stone at the centre of a patterned Sterling Silver open framework, accented with sparkling Marcasite gemstones. Perfect for keeping someone close to your heart.  Made with Sterling Silver and includes an 18 inch 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 the natural Whitby Jet stone 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.