The culture techniques of freshwater pearls and seawater pearls (for example, in the case of Nanzhu) are different, so the structure is also different. Freshwater pearls are non-nuclear, and all ingredients are composed of pearls. Therefore, if pearl powder is made from freshwater pearls, there is no other substance mixed. The seawater pearls are nucleated, and their cores are generally ground from the shells of the pig's trotters. The pearls are only covered on the surface, 0.1 to 0.3 mm thick, and the growth period is about 1 year (the freshwater pearls are 4 to 5 years), so the seawater The pearls on the outer periphery of the pearl are thin. If all the seawater beads are ground, only a small amount of pearls are used, most of which are shell powder, so the medicinal or cosmetic effect is not good, but if the seawater pearls are processed into 100% pearls, Powder, the core must be removed first, the cost is high, and it is not easy to process.
In addition, seawater pearls have many cores, and their shapes are relatively well controlled. Most of them are relatively regular, so the value of decorations or ornaments will be higher. Only a small number of irregular seawater pearls with no decorative value are used to make pearl powder. Therefore, the production of seawater pearl powder is not high. In the Pharmacopoeia, seawater pearls and freshwater pearls can be used equally. Scientific analysis found that the composition of freshwater pearls and seawater pearls is different. Freshwater pearls have three kinds of amino acids lower than seawater, and two species are flat.
The first point: pearl powder is made from the active ingredients of pearls through scientific methods, and the seawater pearls are born in the sea which is very natural and rich in minerals and various nutrients. The sea pearls are in the cold sea. Lili makes seawater pearls cooler, moisturizing and anti-inflammatory; freshwater pearls are produced in shallow water such as lakes or artificial ponds. The growth environment of the two is different, and the minerals and trace elements contained in the two are definitely different. The efficacy of the two is definitely different. In recent years, the fresh water is seriously polluted, and the effect of freshwater pearl powder is much smaller than that of seawater pearl powder.
The second point: the production of seawater pearls is extremely low. Generally, an average of three shellfish can produce one seawater pearl. The output of freshwater pearls is relatively high. According to the introduction of Hunan Yueyang, the largest freshwater pearl breeding base in the country and even the world. On average, each shell can produce 6--8 freshwater pearls, so it is conceivable that the price of seawater pearls is much higher than that of freshwater pearls;
The third point: also the most critical point, due to the development of China in the past ten years, the environmental pollution has become more and more serious, and the freshwater aquaculture mainly relies on feed, the output is high, but the content of inorganic substances in its products is high, and it has the effect of beauty and health care. The organic matter content is very low. Seawater has natural minerals and nutrients, and seawater pollution is relatively small (especially the sea pollution in the North Sea is less, the air in the North Sea is also one of the three best cities in the country, the largest oxygen bar in the country). The pearl is more natural (cultured seawater pearls, but also the nutrients provided by the sea itself, instead of using the feed to raise another big one). The low-yield seawater pearls can guarantee the organic matter content, which is very good for beauty care. Key role
The fourth point: the switch of seawater pearls is more round and shiny, while the switches of freshwater pearls are mostly oval, rice-shaped and so on. The luster of seawater pearls is more crystal clear and radiant, and freshwater pearls lack this kind of feminine luster!
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