Quick view Duke of Glasby Serinium® Square 9mm Wedding Band Bark Finished Black Ceramic Inlay Round Brilliant Diamond $1,395.00 $795.00 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... Choose Options Add to Wish list