Sterling Silver Whitby Jet Mother of Pearl Union Jack Necklace. P2223. This solid sterling silver pendant features Whitby Jet stone which has been sourced directly from the North East coast of Yorkshire. Lustrous dark Mother of Pearl forms the iconic Union Jack flag design. Sold complete with a 24 inch long silver box chain which fastens with a classic bolt ring clasp for easy wear. 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: Pendant 27mm, 9mm bail.