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An alloy of copper and zinc, brass is usually yellow in color, therefore sometimes mistaken for gold. Some types of brass are called bronzes, despite their high zinc content.
Brass has been known to man since prehistoric times, long before zinc itself was discovered. It was produced by melting copper together with calamine, a zinc ore. During this process, the zinc is extracted from the calamine and instantly mixes with the copper. Pure zinc, on the other hand, is too reactive to be produced by ancient metalworking techniques.
Gold is a remarkable, precious metal, with an unparalleled combination of chemical and physical properties. The only yellow metal, its name comes from the Old English word for yellow, 'geolu'. As the only metal that forms no oxide film on its surface in air at normal temperatures means that it will never rust or tarnish.
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