Silver will turn black, such as earrings or bracelets, and it will turn yellow or even black when stained with sweat. Scraping with something slightly harder can scrape off a layer of black dirt, usually by washing with water, wiping with toothpaste and towel, and then turning white. It is said that people with rheumatism will wear black, but it can be washed off, and it will shine when washed off. Those without rheumatism will get brighter and brighter.

Silver is not 925 silver, 990 silver, and thousands of silver. 925 is the most impure, and a thousand feet of silver is the purest.

925 is not pure silver, but an ornament. It is impure silver, contains other metals, is hard and easily broken, and cannot be recycled to Tao Zhu.

Qianzu silver or 99 silver is pure silver, which is soft and easy to deform, but not fragile. You can take it to the gold and silver processing workshop to melt pottery and cast new jewelry.

925 silver, 990 silver, 1000 foot silver, black and yellow silver can all be washed with toothpaste, but the content of 925 silver is low, so the more you wash it, the more dull it becomes, and it will not work for a few months. 990 silver, a thousand feet of silver is still as bright after washing.