Freshwater pearls can be soaked in water, but attention should be paid to the choice of water and soaking time. It is generally recommended to soak freshwater pearls with distilled water or deionized water to avoid damage to the pearl surface caused by minerals and chemical components in the water.

If water containing minerals and chemical components such as tap water or mineral water is used, something similar to scale may be formed on the pearl surface, because minerals and chemical components in the water are deposited on the pearl surface. In addition, if the soaking time is too long, it may also lead to something similar to scale on the surface of pearls.

If there is something similar to scale on your pearl, it is recommended to gently wipe it with a soft brush or a flannel for wiping glasses to avoid using detergents containing chemical components. If the situation is serious, you may need to ask a professional pearl dealer to clean it.