Zinc alloys are a combination of zinc and other metals, such as copper, aluminum, and magnesium. BRASS is an alloy of copper and zinc, while ormolu is an alloy of copper, zinc, and tin. Tombac is an alloy of copper and zinc, and oroide is an alloy of copper, zinc, and nickel. Tambac is an alloy of copper, zinc, and iron, and gunmetal is an alloy of copper, tin, and zinc. All of these alloys contain zinc, making them zinc alloys.