Silver Turquoise Marcasite Triangle Ring. R820. This elegant ring boasts a striking marquise shaped cabochon of Turquoise semi precious gemstone. The stone is placed within an exquisite sterling silver diamond setting that has been embellished by dazzling marcasite stones which bring a sophisticated sparkle to the piece. The ring is completed by a classic sterling silver band. 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 on our website. Silver Turquoise Marcasite Triangle Ring. 29x16mm.