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Pearls - the only gemstone produced in the mollusks body, and it is, perhaps, one of the oldest gemstones used in jewelry because it don't require additional faceting. For many centuries, high-quality pearls sold for exorbitant prices, however, with the apparition in the markets of cultured pearls in the 1920-1930's, pearls price leading come to the end, buy gemstone earrings. To the size of a pea, a pearl increase in 12 years. Mineral plates are bonded with organic material conchiolin. Its change over the time is the cause of pearls "aging", which leads to the loss of its luster. Pearls color can be not only white, but yellow, red, blue and even black. Ancient Greeks called the pearl of the word margaritas. Pearls are known ancient times. They were first mentioned in the ancient Indian epic "Rigveda" and in the Old Testament of the Bible (in particular, in the texts attributed to King Solomon.) For two thousand years before our era, Chinese paid their tributes with pearls. In Persian Gallery of the Louvre holds ancient, consisting of three thread pearl necklace. Pearls were known by Incas and other tribes of South America. Price of a pearl depends on its size and color. More expensive prized pearls, have rich colors and tones. Prices on pearls dropped after developing of a technique of its cultivation in the sea shells, on special farms. To distinguish such a gem from that found by chance is almost impossible, because in both cases, their producer are mollusks. The largest pearl are extracted from the shells of the largest bivalve mollusks - Tridacnids. However, such pearls are usually irregular in shape, buy tanzanite jewelry.
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