Silver Whitby Jet Marcasite Round Beaded Edge Ring. R806. This feminine ring boasts a striking round cabochon of the finest Whitby Jet stone, directly sourced from the North East coast of Yorkshire. The stone is placed within an exquisite Sterling Silver scalloped edge setting with Marcasite stones for added sparkle 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 Turquoise Marcasite Round Beaded Edge Ring. Dimensions: Turquoise - 4mm, Face of ring 10mm.