The blue and green crushed Opal gemstones are graciously inlayed on this easy to slip-on and well crafted Tungsten Carbide wedding band for men. Scratch proof, forever keeps its shine. Blue and green crushed Opal inlay. Tungsten rings are ranked second hardest next to diamond. Cobalt-Free and hypoallergenic: will not cause skin irritations or turn your fingers green. Comfort-fit: contoured inner surface for a more comfortable fit with everyday use in mind. Measures in width: 8 millimeters. Can be laser engraved, but not hand engraved. Can be used as a wedding band, engagement or promise ring. Comes with complimentary leather ring box.