Silver Whitby Jet Marcasite Large Oval Ring. R824. This stunning statement ring, part of our Marcasite handmade jewellery collection, boasts a striking oval shaped cabochon of highly polished Whitby Jet stone, sourced directly from the North East coast of Yorkshire. The stone is framed by glittering Marcasite and 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 online and instore. Silver Whitby Jet Marcasite Large Oval Ring. Stone 24x22mm.