Sterling Silver Whitby Jet Marcasite Rhombus Necklace. P1315. This Whitby Jet and Sterling Silver pendant features a hand carved rhombus shaped Whitby Jet gemstone, which hangs from an 18\" sterling silver chain. The gem is set within a detailed beaded sterling silver frame, accented with sparkling Marcasite gemstones, creating a beautiful piece which completes any outfit. 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 along with matching Whitby Jet pendants on our website. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging. Matching items are available within this collection. Dimensions: 21mm x 18mm, Whitby Jet; 14mm x 12mm.