1. Never use bleach. Chlorine in bleaching water will pit the alloy, decompose the alloy and even corrode the weld. Because the water in the swimming pool contains chlorine, it is not advisable to wear jewelry when swimming in the swimming pool.

2. Avoid using washing powder, detergent and toothpaste containing abrasives.

3. Do not boil in clean or sulfuric acid.

4. Ultrasonic cleaning can avoid the danger of jewelry being washed away. It can be used for diamonds, but it is not suitable for some colored gems.

5. Don't wash with boiling water. The physical properties of diamonds are relatively stable and can be washed with boiling water. However, some precious stones (such as emeralds and amethysts) are very fragile and easily affected by drastic temperature changes, so boiling water should be avoided as much as possible.