BERRICLE Rhodium Plated Sterling Silver Oval Cut Cubic Zirconia CZ Halo Promise Engagement Ring Set METAL: rhodium plated silver, stamped 925, high polished finish, nickel free. RING BAND WIDTH: 3mm. PREMIUM QUALITY STONE: Main Stone: 0.43 carat oval cut simulated blue sapphire cubic zirconia (6mm x 4mm) STYLE: This 2 piece halo ring set offers timeless radiance in a simple yet lavish design. STYLE: Petite - This ring is dainty with small carat weight. Engagement - Ideal for engagement, this ring will be perfect for your special one. Promise - Sweet and sparkling, this style is an ideal promise ring for your girlfriend.