Waterproof, Stainless Steel - Waterproof. and Cubic Zirconia Crystals, 18K Gold, Hypoallergenic, Nickel Free SIZE: 1mm Band Width, Sizes 6 - 8 Designer Note: Simple elegance. Our dainty diamond band adds a touch of sparkle to your stack. Perfectly understated and beautifully crafted from waterproof 18K gold-plated Stainless Steel - Waterproof. available in multiple sizes, featuring stones that look like real diamonds.