Tungsten is a hard, rare metal that is combined with carbon atoms to make a piece of jewelry that is scratch-resistant, hypoallergenic, and beautiful. Tungsten rings do not oxidize, fade, lose their luster, or tarnish. Some of the pros of using tungsten for jewelry include: Durability: Tungsten is the most scratch-resistant metal known to man . Shiny look: Tungsten jewelry maintains a lustrous look for a long time . One of the cons of using tungsten for jewelry is that it can crack under extreme force, and it cannot be resized .