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¡¡¡¡Natural pearls refer to the pearls formed naturally in the bodies of mussel and shell animals.
Natural pearls are very rare and regarded as precious jewelry. In his article formally publicized in 1717,Reau.mur demonstrated that the cause of the formation of pearls, that is, to relieve the uncomfortable feelings resulted from the intrusion of exotic into mollusk, the animals excrete some certain substances to protect themselves, thus form the pearls. Therefore, the pearls are the gift of nature. According to the above principle, freshwater pearls breeding, artificially cuts the covering membrane of pearl mussel into pieces and transplants them into another covering membrane of adult pearl mussel. After the active cells propagate and develop into pearl theca,
the pearl is gradually from. The freshwater pearls of China are mainly cultivated in the branch of ChangJiang River and Lake Tai. The difference between the seawater pearls and freshwater pearls is the breeding manner. Seawater pearls breeding plants the pearls core into mussel and shell, then cultivate these mussels as planned and in scale. The pearls are normally formed within half year. Seawater pearls are cultivated in GuangXi province, Beihai area, Guangdong province, Leizhou area and Hainan Sanya area.
South-sea pearls belong to deep sea artificial breeding, normal breeding time is from one and a half years to two years.
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