Name: Large Lab Grown Diamond Bezel Necklace Short: Our biggest Lab Grown Diamond Bezel Necklace, even bigger. Long: Sitting brilliantly on our classic 1.5mm diamond cut cable chain, adjustable from 15" to 18", our Large Lab Grown Diamond Bezel Necklace is a stunner. Sitting at .5tcw, this 5mm bezel set diamond is an instant classic.