Information about how round sand grains turn into pearls and how sand grains turn into pearls;
1. Peripheral
The mantle of mussel is invaded by foreign bodies (sand and parasites), and the epidermal cells in the affected area take foreign bodies as the core and fall into the connective tissue of the mantle. Some of the trapped epidermal cells divide themselves to form nacre, which secretes nacre and the nucleus is wrapped layer by layer to form pearl. Pearls with foreign bodies as the core are called "nucleated pearls".
2. Internal factors
After the lesion occurs, a part of the outer epidermis of the mantle undergoes cell division and separation, and then it is wrapped by organic substances secreted by itself, and gradually falls into the connective tissue of the mantle, forming beads and pearls. Because there is no foreign body as the core, it is called "seedless pearl".
3. Heterogeneous cell proliferation.
Epidermal cells affected by * * * are diseased and fall into connective tissue to form seedless pearls.
At present, cultured pearls are cut from the mantle of pearl-rearing mussels by artificial methods according to the above principles, and implanted into the connective tissue of the mantle together with the artificial nucleus prepared by mussel shells. The implanted cell fragments rapidly proliferate around the artificial nucleus according to the nutrition provided to the connective tissue, forming pearl sacs and secreting nacre, thus producing artificial nucleated pearls. Artificial seedless pearls are pearls produced by implanting only small pieces of cells into the mantle, forming pearl sacs through cell proliferation, and secreting mother-of-pearl into the sacs.
Freshwater cultured pearls are mostly seedless. The process of pearl formation is wound healing, pouch formation, pearl formation, pearl thickening and pearl rounding. Pearl aging period.
According to the research of relevant departments, great changes have taken place in the pearl sac and its secretory substances during the formation of pearls. There were many glandular cells in the initial cell patch. As time went on, the glandular cells gradually disappeared, and the cell morphology changed from high columnar to flat. Secreted substances also change with the change of cell morphology. The early pearl sac is acidic in pH value and secretes keratin. Subsequently, the pH value turned alkaline, and the dissolved calcium carbonate was secreted to form a prismatic layer. Finally, the pH value becomes neutral and mother-of-pearl is secreted.
Pearl is not only a luxurious ornament, but also a valuable Chinese herbal medicine with high economic value. Pearl industry is often called "treasure house", so it has a bright future. Pearls are cultivated by mussels. Mytilus belongs to Mollusca, Lamellibranchia, with a wide variety and rich resources. In the pearl industry, mussels, crested mussels and pearl mussels are often used for breeding.
In the mussel shell, there are two softwares called mantle. When it comes into contact with * * *, it will rapidly divide and proliferate, gradually surround * * *, form a complete pearl sac, and secrete nacre layer by layer around the source of * * *, and finally form pearls. Natural pearls are accidentally formed by small sand grains, eggs and other foreign bodies.
Invasion into the shell, the epidermal cells of the mantle divide to form a pearl sac, which wraps foreign bodies and secretes nacre to form nucleated pearls.
Why can round grains of sand become tiny pearls, escape into the mother-of-pearl shell and stay in the mantle? The mantle is uncomfortable when it is subjected to * * *, so the secreted nacre gradually surrounds the sand particles that escape from the outside and grows into pearls.
This is not sand. Natural pearls are because one day a grain of sand inadvertently entered the mussel shell, and the soft sand in the mussel shell will be very painful inside, so it constantly secretes body fluids and slowly wraps the sand, so it becomes a beautiful pearl! But it will take a long time. Now most pearls are made by hand!
A schematic diagram of how sand becomes pearls. When the pearl shell breathes, it will absorb the sand in the water, and then it will secrete nacre around the sand layer by layer, and then it will form pearls.
At present, gravel is rarely inhaled, and it is usually inserted into the core. Freshwater pearls are embedded in freshwater mussels. Seawater pearls are inserted into balls ground by pearl shells.
The Jewelry College of Pearl Beauty has detailed instructions.
Why do round sand grains turn into mineral (aragonite) beads containing calcium carbonate, which is produced by the endocrine function of pearl shellfish and mollusks like Pinctada? They are made up of a lot of tiny aragonite crystals.
What is the attitude change before and after the round sand turns into a pearl? I don't know where you use it.
According to the current understanding, there are probably: breaking the cocoon into a butterfly, smoothing the edges and corners, gestating eternity, learning to tolerate, repaying evil with good and so on.