BERRICLE Rhodium Plated Sterling Silver Halo Engagement Ring Set Made with Swarovski Zirconia Round METAL: rhodium plated .925 sterling silver, stamped 925, high polished finish, nickel free. RING BAND WIDTH: 3mm. PREMIUM QUALITY STONE: Main Stone: 0.46 carat round cut blue Swarovski zirconia (5mm), Accent Stones: Swarovski zirconia STYLE: This 2 piece halo ring set glistens with endless sparkles and a vibrant blue center stone for a chic sophisticated look. STYLE: Petite - This ring is dainty with small carat weight. Engagement - Ideal for engagement, this ring will be perfect for your special one.