The method of identifying the authenticity of silver: Silver ornaments are engraved with silver: there is a sign of "S925" or "Ag925", indicating that the metal contains 92.5% silver. This is the most common symbol, the most common jewelry silver on the market, and also the commonly used symbol for selling silver. Foot silver: There is a sign of "S990" or "Ag990", indicating that the silver content of this metal is 99%. This sign is mostly used in silver ingots, silver ingots, silver ornaments and other large pieces of silver ornaments. Silver-plated: The steel seal "SL" or "FS" indicates that this jewelry is silver-plated. Some silver ornaments use 925 silver, while others use 990 silver. What is the symbol of sterling silver jewelry? The National Jewelry Quality Supervision and Inspection Center explained that the national standard stipulates that 990 silver, 925 silver and 800 silver can all be used to make silver jewelry. Now the silver jewelry is generally 925 silver jewelry. 925 silver ornament is 92.5% pure silver and 7.5% alloy, and the alloy is added to improve the luster, brightness and hardness of silver. Moreover, since Tiffany introduced the first set of silver jewelry with a silver content of 92.5% in 185 1, 925 silver has become popular, so at present, 925 is used as the standard to identify whether it is pure silver jewelry. After polishing, 925 silver jewelry presents a very beautiful metallic luster, but also has a certain hardness, which can be inlaid with gems and made into high-grade jewelry. 990 feet of silver is 99% pure silver and 1% alloy. Because of its lack of hardness, it is easy to deform after being made into jewelry, so few manufacturers use it as jewelry, and 990 silver is widely used in industry. 800 silver is 80% pure silver and 20% alloy. Because the lower the purity of silver, the easier it is to oxidize, so manufacturers rarely use it as jewelry. Tested silver jewelry is reassuring. Although the raw material of silver is very cheap, some manufacturers will mix cheaper metals such as cadmium, iron and copper into silver ornaments. Cadmium is harmful to human body and is not allowed to be mixed in jewelry according to regulations. Manufacturers do this mainly to reduce costs and obtain higher profits. Copper wires are mainly mixed in silver locks to make intermediate support frames. According to national regulations, the support frame in the silver lock should also be silver. Because the copper wire is hidden in the silver lock, consumers can't see it at all. Jewelry can only be destroyed after inspection, and its true colors can be seen. Only after a long time, the copper rust inside oozes out, and consumers can find it. Although silver jewelry is not expensive, it is difficult to distinguish between true and false. Although this phenomenon is not common, consumers should master some methods to identify silver jewelry. Consumers can test the physical properties of silver at the time of purchase. Common testing methods are: look at the color of jewelry: the higher the purity, the whiter the silver, and the jewelry surface looks even, shiny and polished. If it contains lead, the jewelry will appear bluish gray; If it contains copper, the surface of jewelry will be rough and the color will not be moist. Jewelry weight: the density of silver is slightly higher than that of ordinary metal. Generally speaking, "aluminum is light, silver is heavy, and copper is not light or heavy." Therefore, it can be preliminarily judged whether it is silver by weighing. If the jewelry is large and light, it can be preliminarily judged that the jewelry belongs to other metals. Hardness inspection: the hardness of silver is lower than that of copper, but higher than that of lead and tin. It can be detected by marking the jewelry in an inconspicuous place with a pin. If the needle slips, it is difficult to leave traces on the surface, which can be judged as copper jewelry; If it is made of lead and tin, the trace is obvious; If the object has traces but is not obvious, it can be preliminarily judged as silver jewelry. Listen to the rhyme: hitting the floor, a piece of sterling silver jewelry, no elasticity, the voice is "boo boo boo". The lower the color, the lower the sound, and the sharper and higher the rhyming sound; If it is made of copper, its sound is high and sharp, and its rhyme is short and short; If it is made of lead and tin, the sound of falling to the ground is dull, short and inelastic. In other respects, silver will change color or even dissolve when it meets any acid. If a drop of concentrated hydrochloric acid is dropped on the inner side of silver jewelry, white moss-like silver chloride precipitate will be formed immediately, other precious metals will not react, and copper will bubble and turn green. The density of silver is10.53g/cm3. Smaller than platinum and gold, it won't fall off by hand. The needle can be traced or bent. This can be distinguished from silver-like German silverware. Pinch with fingers, soft and elastic, high color, easy to bend, not easy to break; The quality of the bend is hard, or barely moving, and some can't even move their fingers; The bending of silver plating or a few strokes with a hammer will crack; Fake ones can't stand bending and break easily. It is not an ideal method to test silver ornaments only by their physical properties and experience. Only by destroying the silver ornaments can the authenticity of the silver ornaments be tested by chemical methods. However, this is beyond the power of consumers. When buying silver jewelry, consumers should not only master some basic inspection knowledge, but also pay attention to whether silver jewelry has relevant certificates, certificates and certificates. Only silver jewelry that has been tested by testing institutions can be purchased with confidence. In addition, the silver content of silver jewelry must be accurately marked, and consumers should check whether there is the word "925" on the jewelry when buying. "925" is a symbol of pure silver. As long as you have "925", you can guarantee that you are buying genuine sterling silver jewelry. Pay special attention to whether its fasteners can be fastened and secure when purchasing. When buying silver chain jewelry, put it flat and see if the links are kinked or bent. The price of silver jewelry is determined according to the content of precious metals, structural design and technology, so the most important criterion for choosing silver jewelry is whether you like it or not.

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