Silver Whitby Jet Marcasite Marquise Beaded Edge Ring. R749. This stunning ring is part of our Marcasite handmade jewellery collection and boasts a striking marquise shaped cabochon of the finest Whitby Jet, which has been sourced directly from Whitby on the North East coast of Yorkshire, framed by glittering Marcasite stones. The stone is placed within an exquisite Sterling Silver beaded detail setting and is completed with a classic sterling silver band. 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 Whitby Jet 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 Marquise Beaded Edge Ring. 19mmx11mm.