Tanzanite Zircon Diamond 18 Karat White Gold Ring For Sale at 1stDibs 5.21 Carat Natural Zircon 18 Karat Yellow Gold Diamond Ring For Sale at Australian Zircon Ring with Diamonds in 18K Rose Gold 11.15cts Gemporia Stainless Steel 18k Gold Plated Zircon Birthstone Ring Etsy Ins Style 18K Gold Plated Zircon Enamel Ring Jewelry. Pieces: 1 piece Material: 18K Gold Plated,Copper,Zircon Care instructions: Avoid wearing during exercise, as sweat will react with the jewelry to produce silver chloride and copper sulfide, which causes the jewelry to deteriorate and corrode over time. Imported Product Measurements (Measurements by inches) & Size Conversion Size Circumference 6 2. 1 7 2. 2 8 2. 3