June Birthstone Ring, 6mm Pipe Cut Cobalt Wedding Band, 0.07ct Alexandrite Solitaire Ring, Brushed Finish Pipe Cut Cobalt Chrome 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. This is a CUSTOM MADE Ring. Please review our policy in the product description.