Black beauty is a kind of tourmaline, which is characterized by various colors, but the overall color is dark. Tourmaline is crystal, which is brittle and does not need polishing. Can be worn normally.

The daily maintenance of black beauty should try to avoid bumping and not be resistant to high temperature. When cleaning, be careful not to use water with too high a temperature. The hot air will have a great influence on the color of tourmaline, making it fall off.