Silver Whitby Jet Marquise Oval Centre Twisted Ring. R752. This feminine Sterling Silver, Whitby Jet and Marcasite ring features an oval cabochon of Whitby Jet stone, that has been sourced directly from the North East Coast of Yorkshire. The striking stone is surrounded by glittering Marcasite and framed by a beaded silver design. All our Whitby Jet jewellery is designed and crafted within our very own workshops in Ashbourne, Derbyshire where a team of skilled craftsmen turn the raw Whitby Jet stone into these stunning pieces of jewellery. You can find other matching Whitby Jet jewellery and other Whitby Jet rings on our website. Silver Whitby Jet Marquise Oval Centre Twisted Ring