Personalized JewelryTungsten DIAMOND SANSERETA RING IS02Signature Tungsten & 0.10CT Black Diamond Ring. Dimensions:Width - 8 mm Tungsten carbide rings are made from chemical compound tungsten and carbon atoms. ... Tungsten rings have became a popular ring of choice because of the hardness. It is much harder than diamonds and solid gold rings. It also is 10 times less likely to scratch than any-other rings.