Secondly, it is to judge the authenticity of silver jewelry by sound. Because the texture of silver is soft, it is real silver when it is thrown, and it is other metals when it is thrown. Then it can be judged by weighing, because the specific gravity of silver is 10.5, which is much larger than many other metals.
Finally, you can bend silver. Silver with good quality is easy to bend but not easy to break, while silver with low quality is hard to handle and will break when bent.
Extended data:
Silver and health
1. Various utensils made of silver can quickly change the electrophysiological characteristics of bacterial cells, destroy their cell structure, disinfect, sterilize and activate cells, and promote detoxification and health preservation.
2. Accelerate metabolism and enhance disease resistance.
3, therefore, long-term use of silver tableware for eating is conducive to enhancing energy and prolonging life.
Distinguish platinum
(1) Seal identification: Jewelry products should be marked with seals and their purity according to national standards. If the jewelry has the words "PT" or "PLATNUM" or "PLAT", it is platinum; If the word "S" or "SILVER" is on the jewelry, it is silver.
(2) Weighing: the specific gravity of platinum is 2 1.4, and that of silver is 10.49. Platinum with the same volume weighs twice as much as silver, so it can be distinguished by weighing it by hand.
(3) Comparison of appearance and hardness: When platinum is carefully observed by naked eyes, it will be slightly light gray and bright white, and its texture is hard. It is difficult to scratch the scar with a pin. Its Mohs hardness is 4.3, while silver is white, and its texture is smooth and delicate. Once oxidized, it will turn gray or black. Its Mohs hardness is 2.7, which is much softer than platinum.
(4) Combustion method: Platinum can resist high-temperature oxidation, and its melting point is as high as 1770, and it will not melt when burned with ordinary high-temperature (gasoline). After cooling, the color will remain unchanged or there will be quenching marks. On the other hand, the melting point of silver is very low. After high temperature combustion, its color is red, black or black depending on the silver content.
(5) Chemical method: Platinum is extremely stable in chemical properties and corrosion-resistant, and will not reflect when it meets any acid or alkali, while silver is not resistant to strong acid corrosion.
References:
Silver (precious metal)-Baidu Encyclopedia