Gromril, also known as Meteoric Iron or Star-Metal, is considered by many as one of the strongest and most valuable metals in the whole of the Warhammer World, rivaled only by the most ancient and powerful of Chaos Armour. Unlike other metal, Gromril is not a metal born from this universe but falls to the Warhammer World through the Warpgates of the northern and southern poles. It was the Dwarfs who first discovered the metal in different places where meteors have struck the Old World. In fact, gromril is only found in the presence of Warpstone. The reverse, however, is not true. Raw gromril is a silvery metal that is incredibly rare and valuable and only the Dwarfs know how to work it.