Dwarves are the guardians of the minerals and precious metals of the Earth. They are gifted not only as blacksmiths, but as tailors, bakers, and fortune tellers as well. Dwarves have the ability to become invisible whenever they desire to do so.
In Norse mythology the king of the dwaves was named Alberich. He was the guardian of the Nibelung treasure, and owner of the Tarnhelm, a helmet which made its wearer invisible.