Purchase beaded jewelry can be fun, exciting and confusing. The cultured pearls are grown by mollusks, but with human intervention, is an irritant introduced into the tank makes a pearl to grow. Imitation pearls are man-made with glass, plastic or organic materials. Because natural pearls are very rare, most pearls used in jewelry are cultured or fake pearls. Cultured pearls, because they are made by oysters or mollusks, usually are more expensive than imitation pears. The value of a pearl culture is a function of their size, usually expressed in millimeters, and the quality of its nacre coating, which gives it luster.

Jewelers should tell your if the pearls are cultured or imitation. Some black bronze, pearls, gold, purple, blue and orange, whether natural or culture, which occur in nature, some, however, are dyed through various processes. Jewelers should tell you whether the colored pearls are natural colors, dyed or irradiated. Clams, oysters, mussels and other shellfish in many calcareous shells are known to produce pearls. But very few kinds yield gem quality pearls jeweler. The pearl is an abnormal growth of mother of pearl or nacre, imbedded in the soft bodies of these shellfish. Today, almost all pearls of gem quality pearl oyster comes from the East has a bright shiny translucent nacre.

A pearl starts growing when some irritating foreign substance like a grain of sand, little mud, parasite or other object lodged in the shell gland called the mantle producers. Size, color, brightness and absence of defects are other essential qualities. Unlike other gemstones such as diamonds, pearls have an average life expectancy of only 50 years.

Nearly all pearls sold today are cultured pearls on the farm. Most farmers raise their own oysters with eggs and sperm of high quality that have developed over the years. When the oysters have matured enough, a mother of pearl pearl found in the internal tissue. X-rays are used to monitor your progress until harvest. The harvest usually occurs during the winter months when the oysters metabolism has slowed. The depots are open and the pearl is removed. Depending on the type of oyster, is being used for other purposes or returned to the oyster is left out. The rest are sold at very low prices, the pearl is removed and the mother of pearl bead is implanted, or they are trying to improve the brightness. All cultured pearls are cleaned and polished to improve the brightness before being sold to jewelers. There are additional treatments that are applied to lower quality pearls to develop a marketable product.

Such treatment is the use of silver nitrate to darken the color or colors. Akoya pearls are often treated with rose. Another type of treatment that irradiation with gamma rays to darken the core of saltwater pearls, making a bluish tinge. It is not considered desirable as a layer can optionally Peel and reveal the surface of the pearl of inferior quality. When you buy some slightly irregular aspect of its colors. covered must be identified with a magnifying device to determine if the pearl has a scaly surface. Unscrupulous dealers have been known to sell beads coated undisclosed treatment.
The techniques developed and perfected over the last century have allowed farmers to produce grains that meet modern specific rules.