BERRICLE Rhodium Plated Sterling Silver Cushion Cut Cubic Zirconia CZ Halo Engagement Ring Set METAL: rhodium plated silver, stamped 925, high polished finish, nickel free. RING BAND WIDTH: 3mm. PREMIUM QUALITY STONE: Main Stone: 0.6 carat cushion cut simulated blue sapphire cubic zirconia (5mm) STYLE: This 2 piece halo ring set boasts stunning simplicity with a vibrant blue center stone for an extra boost of brilliance. STYLE: Petite - This ring is dainty with small carat weight. Engagement - Ideal for engagement, this ring will be perfect for your special one.