Silver Turquoise Marcasite Large Oval Ring. R824. This stunning statement ring, part of our Marcasite handmade jewellery collection, boasts a striking oval shaped piece cabochon of semi precious Turquoise stone. The stone is framed by glittering Marcasite and a beaded silver design. All our Turquoise jewellery is designed and crafted within our very own workshops in Ashbourne, Derbyshire where a team of skilled craftsmen turn the raw Turquoise stone into these stunning pieces of jewellery. You can find other matching Turquoise jewellery and other Turquoise rings online and instore. Silver Turquoise Marcasite Large Oval Ring. Stone 24x22mm.