Sapphire Tungsten and Titanium. 8mm Black Interior Etched Design Beveled Edge Comfort Fit Wedding Band. Patented Sapphire Tungsten is the next generation wedding band combining Tungsten Carbide with Genuine Sapphire and other High-Strength Alternative Metals. Modern matte finish etched exterior men's wedding ring; Beveled edge; Black interior. Scratch Resistant; Shatter Resistant; Hypoallergenic.