How to manually check the purity of silver jewelry?

How to manually check the purity of silver jewelry? -The purity of silver jewelry on the jewelry market is also very different, such as S990, pure silver, S925, Tibetan silver, Miao silver, Thai silver, etc., such articles have been written a lot, let's share with you how to Manually check the purity of silver jewelry: 1. Look at the color of silver jewelry with naked eyes: the higher the purity, the whiter the silver jewelry, and the surface of the jewelry looks white and shiny, with polish. If it contains lead, the jewelry will appear blue-gray; if it contains copper, the surface of the jewelry will appear rough and the color will not be moist. 2. Weight of silver jewelry by hand: The density of silver is slightly larger than that of common metals. Generally speaking, aluminum is light, silver is heavy, and copper is not light or heavy. Therefore, the weighing can make a preliminary judgment on whether it is silver. If the jewelry is large in size and light in weight, it can be preliminarily judged that the jewelry belongs to other metals, not silver jewelry. 3. Use tools to check the hardness: silver jewelry has a lower hardness than copper, but greater than lead and tin. You can use a pin to test the inconspicuous parts of the jewelry. If the needle is slippery and it is difficult to leave marks on the surface, it can be judged as copper Jewelry; if it is of lead or tin texture, the traces are obvious and prominent; if the physical object has traces but is not obvious, it can be preliminarily judged as silver jewelry. 4. Use your ears to listen to the rhyme: the sterling silver jewelry has a sound, no elasticity, and the sound is porch. The lower the color, the lower the sound, and the sharper and higher the sound with rhyme; if it is of copper, the sound is higher and sharp, and the rhyme is quick and short; if it is of lead or tin, the sound is dull and short. , No elasticity. 5. When buying silver jewelry, look at whether there are relevant certificates, certifications, and signatures for silver jewelry. Only silver jewelry that has been tested by a testing organization can be purchased with confidence. 6. The silver content of general silver jewelry is accurately marked on the product. Consumers should check whether there is 925 on the jewelry when buying. 925 is the symbol of international sterling silver.