Pearl is an ancient organic gem. Mainly produced in mollusks such as pearl shellfish and Pinctada. When mussels eat at the bottom of the sea, their shells are opened, sand, parasites and other foreign bodies occasionally fall in, and the mantle is stimulated, so they secrete nacre, wrap the falling foreign bodies layer by layer, make them smooth, and gradually form a pearl sac-a bright and moist outer layer.

According to this principle, cultured pearls are formed by inserting round beads into mussels by nuclear insertion technology. It is generally believed that the epidermal cells of the mantle of mussels rapidly divide and proliferate under certain stimulation, gradually surround the stimulation source, form a complete pearl sac, and gradually secrete nacre around the stimulation source, thus forming pearls. Therefore, whether the pearl formed is spherical or non-spherical depends on whether pearlite can accumulate evenly around the stimulus.

According to the research of geology and archaeology, there were pearls on the earth 200 million years ago. The international gem circle also lists pearls as lucky stones for June birthday and commemorative stones for 13 and 30th wedding anniversary. Pearls with magnificent colors and elegant temperament symbolize health, purity, wealth and happiness, and have been loved by people since ancient times.

chemical composition

The inorganic components of pearls are mainly calcium carbonate and magnesium carbonate, accounting for more than 9 1%, followed by silica, calcium phosphate, Al2O3 and Fe2O3. The organic matter in pearls contains 17 amino acids such as aspartic acid, threonine, serine, glutamic acid, glycine, alanine, cystine, valine, methionine, isoleucine, leucine, tyrosine, phenylalanine, histidine, arginine and proline. In addition, it also contains more than 30 kinds of trace elements, taurine, rich vitamins and peptides.