Silver Turquoise Marcasite Cushion Ring. R745. This simple and stylish ring boasts a stunning square shaped cabochon of the finest Turquoise, the December birthstone. The stone is framed by glittering Marcasite stones and surrounded by an exquisite sterling silver setting that sits on a classic silver band. All our Turquoise jewellery is designed and crafted within our very own workshops in Derbyshire where a team of skilled craftsmen turn the raw Turquoise into these stunning pieces of jewellery. You can find other matching Turquoise jewellery and other Turquoise rings on our website. Silver Turquoise Marcasite Cushion Ring