Quick view Lord Fenwick Serinium® Domed 6mm and 8mm Wedding Band with Grooved Edge Raided Center Polished Finish $525.00 $315.00 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