Tungsten Ring TUR11 a Tungsten Ring with Cubic Zirconia. Tungsten Ring TUR11 is Comfort Fit, making this ring a pleasure to wear. Tungsten Carbide is a very hard, dense metal, twice as hard as steel. It always remains polished and is scratch resistant. Available from ring size 5 to 15. Rings are supplied in a black ring box with a white pad. Ring boxes are supplied in a sleeve, labeled with product number and suggested retail price, for your convenience.