Pearls are calcium carbonate secretions, which form in mollusks without human intervention.
Pearls - Accidents of Nature
Natural pearls are formed randomly and is really simple accident of nature. When a certain type of irritant, like a parasite, becomes lodged in the tissues of mollusks, the animal reacts by secret a calcium carbonate substance called Nacre to coat the intruder and protect the mollusks. Over a period of several years, building it up from Nacre forms a natural pearl.
Discoveries of natural pearls are rare, Pearls have no commercial value or desirability, are extremely rare. Instead, since the early part of the 20th century, cultured pearls have supplanted natural pearls as the most common and available pearls.
Cultured pearls vs. natural pearls
Cultured pearls are still real pearls, grown organically inside of oysters in the same way as natural pearls. The difference is that in the case of cultured pearls, the pearl farmer intentionally stimulates the development of the pearl by inserting a "core" of oysters. Thus, formation and discovery of the pearl is no longer left to chance.
Pearls days
Although natural pearls found primarily in older jewelry from estate sales and auctions, their popularity makes a comeback. Colorful abalone and conch pearls are beginning to find favor in exotic, unique design. Recently, in 2007, a double string of 68 perfect gems known as Baroda Pearls "was sold at auction at Christie's auction house in 7 million U.S. dollars.
Today 99% of the people we look through the beads are actually using the cultured pearls beads. These cultured pearls beads were considered to have little astrological (Moon) influence, if any, because the main body of the so-called pearl is NOT PEARL, but some prefabricated shell-ball implant. This means that it is not a physically separate unit, but just a thin covering of pearl substance (called Nacre) on the surface of a pre-shaped and pre-sized non-pearl bead. A cultured pearls-bead contains only a small percentage of pearl, most of the body is NO PEARL.
In the old oriental and European history, we know that the "Pearl " in the above cases was 100% natural pearl, because cultured pearls beads were not known until recently. But at present almost all (except a learned gemologist) now believe that the hollow "cultured pearls pearl" pearl-imitations are the real thing. This is mass ignorance, and should be treated like any civilized human being who cares about the true nature.
Natural pearls are 100% 'pearl' or Nacre. It is thought that natural pearls form under a set of accidental conditions when a microscopic intruder or grain of sand in an oyster (mollusks), and puts himself inside the tank. The oysters are irritated intruder, secretes the pearl substance called Nacre to cover the irritant. Repeat this process for many years, makes a real pearl which may (or not) can be read by humans. For a natural pearl in shape with a nice round or oval shape, and be free from any error, is actually a real-life "miracle". The odds of a perfect natural pearl are 1 in a million.
Think about your knowledge of gems ... You knew that 'cultured pearls' beads (core-containing and non-nucleated spleen or tissue core contains cultured pearls) and imitation pearls can be distinguished from natural pearls by X-ray? Core Team cultured pearls are often 'pre-formed', as they tend to follow the shape of the implanted Shell bead nucleus. When pre-formed beads are inserted into the oyster, it secretes a few layers of Nacre around the outside of the implant before it is removed after six months or more. When the X-ray of a core that contains cultured pearls' so-called "pearl it will reveal a different structure with a natural pearl (solid center without concentric growth rings, compared with a solid center with growth rings). Many core containing cultured pearls used in the trade today is in fact the majority Shell pearl nuclei with very thin to thin nacreous coatings over them. A natural pearl is determined Nacre, or 100% pearl.
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