The Medieval 6mm Beveled Celtic Irish Ring features a unique knot work pattern circling the ring. Lifetime Guaranteed Forever Metals brand.
The Metal that is used is a Nickel Binder that is higher in quality in comparison to cobalt. Cobalt is a inferior binding agent which may darken the color of the ring over time. Cobalt is most common in lower cost tungsten rings. This is due to the rings being mass produced in countries other than the United States.
Medieval is also available in 7mm width at Medieval Irish carbide beveled celtic rings page.