Generally speaking, there are two reasons for the formation of natural pearls:
A foreign body, such as sand grains, insects or insect sockets, accidentally invades the shell of a mussel and falls into the connective tissue of the mussel together with some epidermal cells of the mantle. The epidermal cells divide and proliferate into Pearl sacs, surround foreign bodies, secrete pearlite, and eventually form pearls.
The other is that part of the epidermal cell tissue of mantle breaks away from the original part and enters the connective tissue, dividing and proliferating to form a Pearl sac. The pearls thus formed are seedless.
When the clam feeds on the seabed, the shell opens, foreign bodies such as sand grains, parasites fall in occasionally, and the mantle is stimulated, it secretes pearlite, wraps the foreign bodies in layers, makes them smooth, and gradually forms a Pearl Sac-A bright and lustrous outer layer. According to this principle, cultured pearls are planted into mussels by inserting nuclei, and then pearls are formed.
It is generally believed that the epidermal cells of mussel mantle divide and proliferate sharply under certain stimulation, gradually surround the source of stimulation, form a complete Pearl sac, and take the source of stimulation as the center, gradually secrete pearlite layer by layer, thus forming pearls. Therefore, the formation of pearls is spherical or non-spherical, the key is whether the pearlite can evenly accumulate around the stimulus source.Click here to browse a selection of popular pearl jewelry items.