Sterling Silver Whitby Jet Marcasite Cushion Necklace, P1317 This sterling silver, Marcasite and Whitby Jet cushion pendant is hand crafted within our  workshops by our highly skilled jewellers. Using genuine Whitby Jet and set with 5 sparkling marcasite gemstones this necklace would make a perfect gift.  Complete with a 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: 15mm x 15mm.