How to distinguish the purity of sterling silver jewelry

How to distinguish the purity of sterling silver jewelry-how to distinguish the purity of sterling silver jewelry? Although silver jewelry is not so expensive, how to distinguish it? Jewelry will tell you. First, check the imprint, according to the national standard 'GB1187-8P' , The silver content of not less than 925‰ is called 925 silver, and the silver 925 mark; the silver content of not less than 990‰ is called the pure silver, the pure silver mark, or the silver 990 mark. Secondly, the purity of sterling silver jewelry is higher, the silver is whiter, the surface is fine, uniformly shiny, and polished. If it contains lead, the surface is bluish gray; if it contains copper, the surface is rough and dry. Although the oxidized silver has 'black rust' on its surface, its color is black and bright, while lead, tin, and cupronickel have no luster. Because the density of silver jewelry is slightly higher than that of common metals, generally speaking: 'aluminum is light, silver is heavy, and copper is neither light nor heavy.' Therefore, weighing can make a preliminary judgment on whether it is silver. In addition, the hardness of silver is lower than copper and larger than lead and tin. Therefore, you can use a pin to scratch the surface of the object for testing. If there are traces but not obvious, it can be preliminarily judged as silver jewelry. For the common counterfeit silver on the market, counterfeit silver jewelry is generally made of cupronickel, lead, tin, aluminum, etc., and its characteristics are: the appearance of the cupronickel is grayish white, the stubble is brick gray with green rust; the lead is gray Blue, soft, can be marked with nails; tin is silvery white and soft; aluminum is white-gray, soft in texture, and light in specific gravity. The above is the method for distinguishing sterling silver jewellery by jewelry. I hope it will be helpful to you. If you want to know more about silver jewelry, please pay attention to us: