It is said that the purity of silver is very high, which is almost the same as that of thousands of feet of silver. However, Lijiang and Yunnan are the producing areas of Miao Yin, so it's easy to be fooled ~ Miao Yin is regarded as thousands of feet of silver, after all, it's impossible for the naked eye to judge whether the silver ornaments are plated, and the silver content is the easiest to buy. Let the seller burn it when you buy it, and it will be red and white after cooling, which is pure silver. It is said that there is basically no experiment, or it may be fake ~ ~
There are two current standards of silver content in jewelry in China, which are 990‰ and 925‰ respectively. The labels of silver content in jewelry in China are S990 and S925.
Why is silver black?
Pure silver is a precious metal, which is not easy to be oxidized and blackened at normal temperature and pressure. S925 Silver will turn black on the surface (but not on the inside) in the environment polluted by acid, alkali or sulfide. Common treatment methods: soak in acid and vinegar for 10 to 15 minutes, and then scrub with household detergent to make it as bright as new; You can also go to a regular jewelry store to clean it.
What are Tibetan silver, Miao silver and Macarthur? This is the name to distinguish silver ornaments with different origins, crafts and silver content.
Now the price of silver is only 4.5 yuan per gram.