Silver Whitby Jet Union Jack Pendant Necklace. P2706. This patriotic pendant features Whitby Jet stone that has been sourced directly from the north east coast of Yorkshire. The stone is set within a sterling silver Union Jack flag design. The pendant is presented on an 18 inch long silver chain complete with a classic bolt ring clasp for easy wear. All our Whitby Jet jewellery is designed and crafted within our very own workshops in Derbyshire where a team of skilled craftsmen turn the raw Jet into these stunning pieces of jewellery. You can find other matching Whitby Jet jewellery and other Whitby Jet necklaces on our website. Silver Whitby Jet Union Jack Pendant Necklace. Pendant 29x14mm plus 4mm bale.