Tamahagane
Tamahagane {tah-mah-ha-ga-neh} is a high quality metal (steel) made in the Japanese tradition. The word tama  means "round and precious", like a gem or jewel. The word hagane means  "steel". On the market, it costs 50 times more than ordinary steel. Tamahagane steel is used to make Japanese swords, knives, and other kinds of tools.