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When choosing the rings you should remember that they never made out of pure precious metals. In fact, the ring, which is considered to be gold or platinum, are made of alloys of several metals to improve strength and durability of products. The soft plastic and the gold is not suitable for the creation of jewelry, so it connects with silver, copper, nickel, zinc, or palladium. Silver and platinum are usually connected with copper. Determine how many gold, platinum and silver in an alloy can be in the sample. The sample - a special stamp from the plant, make jewelry, which is on the inside of the ring and said about the percentage of noble metal in the alloy. Typically, this content is expressed in thousands of units of weight alloy, but in some countries, such as America and Britain, using carat system with pure metal without impurities take over 24 carats. The highest gold sample is considered to be 958-I. Also, there are articles 750, 583, 500 and 375 samples. The most common are the rings of white or yellow gold 585 samples. They are a gold alloy of 58.5% and 41.5% other metals and are characterized by strength, bright color and rich luster. Wedding rings may be formed from silver, but this metal is very soft and fragile.
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