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some silver jewelry, 925 silver, some with 990 silver, in the end which is a sign of sterling silver jewelry? National Jewelry Quality Supervision and Inspection Center explains, national standards for 990 silver, 925 silver, 800 silver can be used to make silver jewelry. Now say silver jewelry are generally 925 silver jewelry. 925 silver jewelry is a content of 92.5% pure silver added 7.5% alloy adding alloy in order to let the silver gloss, brightness and hardness are improved. Since 1851 Tiffany launched the first set of silver content of 92.5% silver jewelry, 925 silver became popular, we now have identified 925 as to whether the standard of sterling silver jewelry. 925 silver jewelry, polished after showing a very beautiful metallic luster, but also has a certain hardness, inlaid stones, made of high-grade jewelry. 990 fine silver is pure silver content of 99% and 1% of the alloy, due to its hardness is not enough to produce easily deformed into jewelry so few manufacturers use it for jewelry, and 990 Silver industrial use is more extensive. 800 silver content of 80% pure silver added alloy of 20%, due to lower silver purity more easily oxidized so manufacturers rarely use it for jewelry. By detection of silver jewelry reassuring. Although silver raw materials are cheap, but there will be some manufacturers in the silver mixed with cadmium, iron, copper and other cheaper metals. While cadmium is harmful to the human body, in accordance with the regulations is not allowed doped jewelry. The manufacturers do so mainly in order to reduce costs, achieve higher profits. Copper is doped in the silver lock to do support frame in the middle, in accordance with state regulations support frame silver lock silver. Because the copper wire hidden inside the silver lock, so consumers do not see, and only during the jewelry detect when it destroyed in order reflected in its true colors. Only until a long time, the patina inside oozed, consumers can find. how to identify the purity of silver jewelry, silver jewelry is not expensive, but there really is false, although this phenomenon is not widespread, but consumers should still have some method to identify silver jewelry. Consumers to buy when tested by the physical properties of silver commonly used test methods: see jewelry color: the higher the purity the more white, silver, jewelry shiny surface looks uniform with polish . If leaded, jewelry showing gray; such as copper jewelry rough surface would seem, the color is not moist feeling. weigh jewelry Weight: silver density slightly larger than the average common metal generally speaking: silver to make a preliminary judgment. Jewelry volume larger and lighter, you can determine the initial the jewelry case other metal. check hardness: the hardness of silver than copper low over big lead, tin, and available test pins zoned jewelry humble, such as needle slip surface is difficult to leave marks, you can judge for copper quality jewelry jewelry; such as lead, tin texture, traces Obviously, highlighting; such as physical traces left less obvious, can be initially determined for silver jewelry accessories. listen rhyme: sterling silver jewelry jewelry resounding no elastic sound as porphyrin da porphyrin da. Lower fineness, the sound is lower, and the higher the sound more sharp with rhyme; case of copper, its sound is more rapid and short tip, rhyme sound; case of lead, tin texture then throw to sound boring, short , no stretch. alone the physical properties of silver and experience to test the silver jewelry is not very satisfactory. How to identify silver jewelry purity, only the silver destroyed using chemical methods to test the true and false pros and cons of the silverware. However, this is the consumer reach. Consumers when buying silver jewelry in addition to master some basic testing knowledge should also be noted that silver jewelry certificate to prove that the card signed, silver jewelry can be bought only through the testing organizations must be assured. In addition, silver jewelry silver content must be accurately marked consumers the purchase should Yankan As long as the The purchase also pay special attention to whether it's fasteners to fasten and securely. Buy silver chain jewelry when you want it flat, to see whether the link is a kink or bend. Silver jewelry prices are based on precious metals content structure design and craftsmanship of decisions, so choose silver jewelry is the most important criteria is to see if you like it.
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