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. These conditions will lead to the change of red coral color, resulting in different shades of color.

Cleaning method: Rinse the coral with clear water after use, and then dry it with a clean cotton towel.

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