Sterling silver turquoise toscana marquise twist ring r512 this striking ring is a part of our handmade toscana collection and features a stunning marquise shaped cabochon of natural turquoise gemstone the december birthstonethe stone has been placed within an exquisite sterling silver setting which compliments the dazzling greenish blue turquoise beautifully the ring is completed by a classic sterling silver band all our turquoise jewellery is designed and crafted within our very own wo