This unique Cobalt 6mm comfort-fit satin-finished band features a high polished center trim. This unique Cobalt 5mm comfort-fit band features a high polished finish for a more traditional yet modern appearance. Cobalt is 4x harder than Platinum, 5x harder than Gold and 7x harder than Silver. It is hypoallegenic, scratch resistant and shatter proof. This ring is also available in Titanium, Ceramic, Palladium, Gold or Platinum. If interested in Titanium or Gold, please call for pricing.