The Enigma is one of the most beautiful rings from our Black Tungsten Rings collection by Thorsten. This style is a domed shape black tungsten carbide ring with a brushed finish and crisscross groove pattern. The crisscross pattern is also lined with parallel grooves that encircle the entire black tungsten ring, bringing together the ring's appearance quite stunningly. This ring can be worn as a Wedding Band or Promise Ring by men or women. Larson Jewelers is proud to present our designer Black Tungsten Carbide Ring line by Thorsten. Please note, Black Tungsten Carbide rings are very durable, but can be scratched. Truly Free Lifetime Sizing and Lifetime Warranty on all tungsten rings, no exchange and no sizing fees, which are charged by other retailers.