Derived from ancient Persian Sanskrit, it means "son of the sea". Pearls are not natural gems. When it is produced in some shellfish (mussels) and cannot be eliminated, its cell membrane will secrete nacre liquid, which will continuously wrap the foreign bodies layer by layer and become pearls over time. According to the causes, it can be divided into natural pearls and cultured pearls.
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In the Ming Dynasty, Li Shizhen paid more attention to the pharmacological effects of pearls, and believed that the efficacy of pearls was to beautify the skin. Therefore, he wrote in Compendium of Materia Medica: "Pearls are salty, sweet, cold, non-toxic and calming; Pearlescent coating makes people moist and look good. Apply hands and feet, skin peeling; Eliminating phlegm, removing spots and stopping diarrhea; In addition to children's fever, soothe the soul; Stop nocturnal emission, remove acne and cure poison.
In the Ming Dynasty, Chen Jiru quoted Du Yizhi as saying that when Li Yan was in power in Tang Wuzong, Prime Minister Li Deyu made soup with jewel powder, realgar and cinnabar, each cup cost about 30,000 yuan, but after three times of decoction, the dregs were discarded. At that time, alchemy was popular, and it was believed that pearl powder, realgar and other things, after refining, could be taken permanently, and the crane hair was beautiful.
Both People's Republic of China (PRC) Pharmacopoeia and Dictionary of Traditional Chinese Medicine point out that pearls have the functions of calming nerves, improving eyesight, removing toxic substances and promoting granulation, while modern research also shows that pearls have unique functions in improving human immunity, delaying aging, removing spots and whitening, and supplementing calcium.
References:
Baidu Encyclopedia-Pearl