Quick view Bishop Birdale Serinium® Beveled Edge 8mm Wedding Band Rectangle Grooves, 3 Round Diamonds, Stone Finish $2,350.00 $1,395.00 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