Someone told me that use the toothpaste to brush the pearl surface can make it to be as bright as a new one. However, it is not an ideal way to do so. The toothpaste contains a high micro-hardness abrasive particulate matter, which is particularly small but hard (almost as hard as the crystal). That's to say, the method of cleaning jewelry by toothpaste will damage the surface which hardness is lower than the crystal, such as the surface of pearl, gold and K gold. The correct cleaning solution of pearls should be use the neutral-active agent (such as baby shampoo). I had made a detailed introduction about it in previous article How to Recover Pearl's Nature Gloss.
In carefully cleaning the exquisite pearls at the same time we want to understand some maintenance tips for pearl necklace.
--- Keep away from the dirty air. Pearl surface has some tiny pores can inhale the dirty substances in the air,like hair spray, perfume steam, smoke and other substances. Therefore, we should not wear pearls in the hair salon and kitchen.