![]() It turns green if left unmaintained and can turn your skin green when in contact. Like all copper alloys, bronze also tarnishes easily when it reacts to moisture and air. Bronze: Bronze is an extremely durable copper alloy, made typically of copper and tin.Brass is sometimes treated with a lacquer coating to prevent it from such exposure. It tarnishes quickly when exposed to moisture and air. Brass develops a green patina over time if left unmaintained and can also turn your skin green. Brass: Brass is a bright gold-colored alloy made of copper and zinc, commonly used in costume jewelry. ![]() However, sterling silver can easily be polished and its luster restored. It tarnishes easily because of the copper content in the alloy which oxidizes when exposed to air and moisture.
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