Using bleach bought in the supermarket, it cost more than 5 yuan, and it turned white in a day or two. After soaking, rinse with clear water for a few days. Maintenance is very important.

First, avoid heavy blows and collisions, so as not to fall off and be damaged;

Second, avoid contact with chemicals, acids, lye and perfume;

Third, wipe it with a soft cloth after each use and keep it properly;

Fourth, always soak in water and wipe off the oil, so as to keep it "bright and bright" again and again; Because the chemical composition of coral is CaCO3, its chemical properties are unstable. People should not wear coral necklaces for a long time when sweating in hot summer, because the salt and acid secretions in sweat will corrode corals. Coral should not touch cosmetics, perfume, alcohol, salt, oil and vinegar. Coral structure is not dense, porous and easy to get dirty. Use neutral soapy water when cleaning.

Maintenance method: use colorless waxy baby oil or olive oil, etc. Leave it overnight to restore luster.