9ct yellow gold turquoise toscana marquise twist ring r512 this striking ring is part of our toscana collection and features a stunning marquise shaped cabochon of rare turquoise the december birthstone the stone has been placed within an exquisite 9ct yellow gold twist setting which complements the turquoise beautifully the ring is completed by a classic yellow gold band all our turquoise jewellery is designed and crafted within our very own workshops in ashbourne derbyshire where a team