Silver turquoise marcasite cushion ring r745 this simple and stylish ring boasts a stunning squareshaped cabochon of the finest turquoise the december birthstone the stone is framed by glittering marcasite stones and surrounded byan 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 jewell