Tungsten Carbide 8mm Ring with 0.04ct Blue Sapphire Center Stone and with Blue & Black Carbon Fiber Inlay Tungsten Carbide 8mm Ring Tungsten Carbide Ring with 0.04ct Blue Sapphire Center Stone Ring Size : 9 Tungsten Carbide with Blue & Black Carbon Fiber Inlay Tungsten Carbide Engagement And Wedding Band Rings