Choose Options Quick view Countess Marianna Serinium® Domed 2mm Ladies Wedding Band Stone Finish Serinium® DurabilitySerinium® tough, hard and scratch-resistant. Serinium® is twice as hard as Cobalt Chrome, 5 times harder than Titanium, 6 times harder than Platinum, 7 times harder... MSRP: $595.00 $330.00 - $350.00 Choose Options