This awesome 7mm concaved Tungsten band features a satin-finished center with polished edges and a comfort-fit on the inside. Tungsten is one tough metal indeed. It happens to be (10x) harder than gold or silver, (8x) harder than platinum and (2x) as hard as steel. The name comes from the words Tung and Stun which mean Heavy Stone in Swedish. Though Tungsten is extremely strong and scratch-proof, the only thing stronger than it is an actual diamond.