When it comes to pearls, many of my friends can tell some of the characteristics of pearls. For example, they are made from seashells and are divided into seawater freshwater pearls. For pearls, they are even more precious. But do you know which pearls are nuclear and which ones are not nuclear? "What? Pearls are also divided into nuclear cores!" This is the reaction of many people who know nuclear pearls for the first time. Today, Pearl said that Xiaobian has the difference between nuclear and non-nuclear pearls under the popular science, and which There are nuclear pearls, which are non-nuclear pearls. Is it good to buy nuclear pearls or nuclear-free pearls?
Nuclear pearls and seedless pearls
Non-nuclear pearls are artificially transplanted with cell membranes of the cockroaches. They are all layers of pearls from the inside to the outside. The growth period is 4-5 years. A clam shell can produce many pearls. In general, most of the non-nuclear pearls are freshwater pearls.
Nuclear pearls are generally seawater pearls, but some freshwater pearls are also nuclear pearls. They are called Edison Pearls. It is a new pearl variety developed by a pearl company in Zhejiang Province in recent years. The cored pearl has a nacre with a nacre, and the middle is a bead nucleus. The growth period is 2-3 years. The pearly secreted by marine shellfish is formed by coating a layer of nacre on the surface of the artificially implanted core. Generally, a clam shell can only produce one pearl.
The high-quality seawater pearls are basically formed by the round-shaped artificial bead core and the natural secretion of the mother-of-pearl. When some of the mother-shells are not well grown, some pearls with tails will be formed. The shape of the seawater pearl is basically the shape of the bead core when it is planted. The bead core is mostly round and has a semicircular shape such as mabepearl. Only the whole natural wild seawater pearl is non-nuclear, and it grows into a positive The round all-natural wild seawater pearl is very rare, and it is almost impossible to see on the market. Even if it is, the price is not what the average person can consume!
Another case of nucleated pearls is that when the mantle film of the cockroach is stimulated by the intrusion of foreign matter (sand, microorganisms, etc.), the epidermis cells in the irritated area are foreign bodies nucleated into the connective tissue of the mantle, and the trapped part The epithelial cells of the mantle are self-divided to form a pearl sac, and the pearl sac cells secrete the pearl, and the layers are layered to form a pearl. This kind of pearl with foreign matter is also called "nuclear pearl."
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