The Oracle 7mm Beveled Eternity Knot Celtic Ring and Wedding Band features a laser engraved knot pattern circling the ring. 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.
Looking for a carved style, try viewing Oracle endless knot carved celtic rings style.