Ladies February Birthstone Ring, 6mm Ladies Wedding Band, 0.07ct Ladies Amethyst Solitaire Ring, Classic Dome Brushed Center Comfort Fit Cobalt Chrome Ladies Anniversary Ring Cobalt is the whitest, inexpensive contemporary wedding band material in the market Resembles and has the look and feel of PLATINUM or WHITE GOLD RINGS Stays as white and does not require rhodium plating. Cobalt is not only hypoallergenic, it is bio-compatible. Comfort Fit Wedding Band