One: According to the cause of formation, pearls can be divided into two categories: natural pearls and artificial cultured pearls.
1. Natural pearls
It is a pearl formed by wild shellfish in a natural environment. Natural pearls can be formed in various environments suitable for growth such as sea water, lake water, and rivers. Such pearls are very rare and expensive.
2. Artificial cultured pearls
In the natural environment, in the artificially cultivated pearl mussel, the pearl nucleus or foreign body is artificially inserted, and then cultivated to gradually form the pearl. In the pearl market, most of them are cultivated pearls. Artificial cultured pearls can be further divided into nucleus cultured pearls, non-nucleus cultured pearls, regenerated pearls, and shell pearls according to the characteristics of the nucleus and foreign matter.
Second: According to the production environment, it can be divided into two categories: seawater pearls and freshwater pearls.
1. Seawater pearls
It refers to the pearls produced by sea shellfish, which can be further divided into two categories: natural seawater pearls and artificial cultured seawater pearls according to their causes. The quality of seawater pearls is generally higher than that of freshwater pearls. Zhenlilai cosmeceuticals uses pearl placenta sac element extracted from seawater pearl embryos.
2. Freshwater pearls
It refers to the pearls produced by freshwater mussels, which are generally produced in various lakes, rivers and streams. Mainland China is the main producer of freshwater pearls, accounting for 85% of the international freshwater pearls, followed by Japan and the United States.
