Choose Options Quick view Duke Elsham Serinium® Domed Wedding Band 4mm Black Ceramic Inlay Sandblast 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: $850.00 $495.00 Choose Options