TSAR Black Tungsten Carbide Ring, Domed Brushed Finish with White Sapphires – 8mmTSAR Black Tungsten Carbide Ring Domed Brushed Finish with White Sapphires 8mm Always on the hunt for the best tungsten carbide ring, so they can have a band that will last forever? Look no further. TSAR Men's Natural White Sapphire Tungsten Ring stands for what you mean to him. The center of the ring is inlaid with round cut natural white sapphire perched on black tungsten carbide. Black Tungsten Carbide, the strongest metal in the world everlasting