Copper

A soft yet corrosian resistant metal. And the only metal found on Earth besides Gold that is not white or grey. Copper is many races first metal that they work. Copper can be alloyed with Tin to make Bronze. Copper is used in electronic devices because its ability to conduct heat and electricity is second only to Silver. Copper is also very good for plumbing, because it does not react with water and because of its antiseptic properties.