James Allen's naturally white Cobalt collection features a natural and long-lasting high luster that never fades or discolors over time. Cobalt is four times harder than gold, hypoallergenic, and scratch resistant creating the perfect combination! This ring features a blackening process where we are literally punching the black into the actual ring as to where typical coating processes are simply surface coatings. This ring also features a rounded polished interior that allows the ring to slide easily and rest comfortably on the finger.