Gorgeous Paraiba Tourmaline Ring â–ºBase Metal: Sterling Silver (925)â–ºPlating: 14K Rose Gold â–ºAccented with simulated diamonds (CZ)â–ºAverage band width: 2.3 mmCenter Stone: Paraiba TourmalineColor: TurquoiseShape: PrincessMeasurements: 6.0 mmCarat Weight: 1ct. (approx.)Gemstone creation: lab-createdHardness: 7-7.5 (Mohs scale)