Cooper jewelry, with bright color appearance, it had been a lot of people praise from ancient times to the present. Cooper jewelry includes necklace, rings, bracelet, etc; all of them are with fine workmanship and elegant appearance. Because the use of brass is early and cheaper than other precious metals such as gold or silver, so the cheap cooper jewelry is also one of the most widely jewelry loved by the common citizens in the early ancient time. Today, cooper jewelry is also very popular in some places; it passed on from generation to generation and become a classical and traditional jewelry. Even in some ethnic groups, the tradition of wearing cooper jewelry is as one of their national tradition. Brass is one of the first metals to discover by human beings. Before thousands years, human began to use brass. This also made cooper jewelry as one of the earliest jewelry that people worn in history. Most of the cooper jewelry that people of the modern society wear is actually alloy jewelry. This kind of brass is an alloy that made of copper and zinc. The brass which is made of copper and zinc is called common brass. If the brass is a several alloy that consisting of two or more elements, for example the copper alloy which made of lead, tin, manganese, nickel, iron, silicon, is called special brass. Brass has good wear poof ability. Compare with other metal, cheap is the greatest strength of brass, and has good pliability and ductility, and is easy to work. Cooper jewelry also has drawback, like it is easy oxidation and changing color and many people will allergic to brass. Because of its good ductibility, and be easy to work, brass is often used to make cheap jewelry, even some new concept fashion jewelry also use the low cost brass. After treated by polishing which is to anti-oxidation, cooper jewelry can get beautiful color. After treated by polishing, the appearance of cooper jewelry is similar to gold jewelry, some lawless person often palm off the cooper jewelry as gold jewelry, in fact, it’s not difficult to identify cooper jewelry and gold jewelry. Because the proportion of brass is less than gold, in the same size conditions, gold jewelry is heavier than cooper jewelry, and its color is more yellow, cooper jewelry’s color appears redder. There is one main drawback to copper jewelry ; it’s easy to oxidation and change color. To prevent oxidation, it’s best to avoid contact with the water, and galvanize or daub a layer of isolation. If the cooper jewelry becomes oxidized, the best way to clean it is to send it to a professional jewelry store. The simplest way is to wipe it with cloth which dips a little toothpaste, it better to use a polishing compound substitute for toothpaste. Finally, coat with a nail polish on the treated cooper jewelry, make it isolated from air to prevent oxidized and change color again. Ordinary consumers criticize cooper jewelry for it makes people's skin allergic, and an excess of copper entered the human’s body can cause harm to human’s body. But there’s another opinion in medical community, some medical specialists regard that wearing cooper jewelry can prevent arthritis and help improve the skin. Even have medical journals expound the science which of wearing cooper jewelry can prevent arthritis by professional papers. Cooper jewelry is harmful or healthful to human’s body, however, it till needs more authoritative scientific evidence to judge, but one thing we can assure that, in the development of human civilization cooper jewelry used to be one of the most popular jewelry in the past thousands of years.
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