Quick view Earl Faldingworth Serinium® Domed 8mm Wedding Band with Center Groove Polished Finish $550.00 $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