A pearl
Pearl is an ancient organic gemstone. The main production in the pearl oyster and shellfish mother of Pearl animal and software; because of the endocrine function and containing calcium carbonate mineral formation (Wen Shi) beads, is composed of a large number of tiny crystals from the collection of Wen Shi. According to the geological and archaeological research shows that two hundred million years ago, earth has been a pearl. China is the world worthy of the name of pearl pearl of ancient records can be traced back to 2200 BC. The international gemstone pearl will be listed as the lucky stone birthday in June, married thirteen anniversary and the thirty anniversary of the stone.
Medicinal value
Pearl not only some elegant temperament, a symbol of health, pure and noble, it has a very high medicinal value. Ming Li's in the "compendium of Materia Medica" particular, wrote: "Pearl tastes salty sweet cold, non-toxic, the town center; pearl painted face, a good color of moist. ". In addition, pearl and sedative given shock, eyesight to nebula, detoxification myogenic effects, modern research also shows that pearl in improve human immunity, slow aging, freckle whitening, calcium supplement and so on have a unique role.
A flaw
As the only does not need to be processed is natural generated with amazing vitality of treasures, the 100% perfect theory of pearl is not exist, because even naked eye is difficult to see, with 10 times or even higher magnifying glass, can still see the surface of the Pearl of the natural growth of lines and uneven. From a practical point of view, there are indeed some pearls with the naked eye almost invisible or very difficult to see any flaws in the field of commercial applications, industry experts will be called. National standard "Pearl grading standards", the "flawless" definition is "the naked eye observation surface smooth and delicate, very difficult to see flaws". Most cultured pearl surface will be more or less thread, concave and so on. This is the saying goes "according to the theory of flawless Pearl".