4MM BLACK DIAMOND FACETED TUNGSTEN CARBIDE RING

2 for $150!! Both rings are size 5.5 weight: approx 3-6 grams each Cobalt free Comfort fit Superb condition Tungsten material is the hardest metal that's used for jewelry. Tungsten carbide is scratch resists material. Tungsten can take day to day beating and it can still look the same after couple years. It is strongly recommend keeping your ring away from tough environments.