Brass

an alloy of copper and zinc, of a bright yellow color, hard, ductile, and malleable. The best bra consits of two parts by weight of copper to one of zine. Before zinc was obtained in its metallic form bra was manufactured from calamine (native carbonate of zinc) mixed with copper and charcoal, Hyen now this proce is easier than the direct fusion together of the two metals. The proportion of copper and zinc vary.