A friend bought a silver belt marked S990 in Dai village of Xishuangbanna. Is it true?/You don't say.

The authenticity also needs a special jewelry appraisal agency for appraisal. Whether it is pure or not can not be distinguished without professional instruments, but it should not be a traditional home-made handicraft.

S990 is the letter symbol of foot Silver jewelry, in which the letter S is the first letter of the English word Silver, which stands for silver, and 990 stands for silver content not less than 99. Another sign is S99, which means the same thing. Weigh enough silver, the silver content is not less than 990‰. Because it is too soft, it is not easy to cast into the desired jewelry shape, and it is easy to wear and oxidize and blacken, and the processing cost is too high, so it is not suitable for jewelry.