It's true. Also called burning. Because the white of other metals is different from silvery white after all, the difference is especially obvious after combustion and cooling. After barbecue with fire, if it is real silver, the silver will remain unchanged; If it is fake silver, or a product with poor quality, it will turn black after barbecue.

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Other identification methods:

1, color discrimination method: with eyes, it is white, shiny, fine in workmanship, and the jewelry is printed with the store number, which is a high-quality silver jewelry; Most of the color difference, poor color and dullness are fake silver ornaments. ?

2, bending method: gently fold the silver jewelry by hand, easy to bend and not easy to break color; Stiff, barely folded colors are lower;

Silver-plated jewelry will crack if it is bent or knocked a few times with a hammer; Those that can't stand a light discount and are easy to break are fakes. ?

3. Throw method: throw the silver jewelry on the table from top to bottom, and the silver jewelry with low rebound and smooth sound is of high quality;

High-pitched, shrill voice silver jewelry thrown on the table, which is fake or of low quality. ?

4. Nitric acid identification method: use a glass rod to drop nitric acid on the file mouth of silver jewelry, which is brown rice color and slightly green. Dark green and black are light colors.