PEARL

Pearl is a hard object produced within the soft tissues (especially coats) of live mollusks. Just like his shell, pearls made of calcium carbonate in crystalline form that has been deposited in concentric layers. The ideal pearl is perfectly round and smooth shape, but there are also various other forms. The best quality natural pearls have been highly valued as gemstones and objects of beauty for centuries, and therefore, the word "pearl" has become a metaphor for something very rare, good, admirable, and valuable.

Precious pearls found in the wild, but in a quantity which is very rare. Cultured pearls or pearl oysters originating from the majority of pearls sold on the market. Sea pearls valued higher than freshwater pearls. Are sold at cheap prices is fake pearls, but the quality is usually bad. In general, imitation pearls can be easily distinguished from genuine pearls. Cultured pearl lots to be used as jewelry. But in the past, pearls are also used as decorations on fancy clothes. Pearls can also be crushed and used in cosmetics, medicines, or in the paint formula.

Pearls are considered quality is almost always a colorful and resembles mother of pearl, like a leather interior that produces them. However, almost all types of shelled mollusks can produce pearls are slightly less bright or less round shaped like a ball. Although they may also legitimately be called as the "pearl" by the laboratory Gemology and also under the rules of the U.S. Federal Trade Commission and formed the same way, most of them worthless, except as antiques.

Almost all shelled mollusk can produce several types of pearls, through natural processes, when a microscopic object trapped inside the mollusk mantle folds, but most of the pearls are not valued as a gemstone.

A natural pearl is formed without any human intervention at all, in the wild, and very rare. About a hundred pearl mussels should be collected and opened, and thus killed, only to find one pearl wild, and for centuries it was the only way to get pearls. This is the main reason why pearls, including very valuable in the past. Cultured pearls, on the other hand, is one type of pearl that is formed with the involvement of humans, in a pearl farm.

Pearl oyster

Pearl oyster (Pteriidae Familia) is the pearl of the most commonly cultivated for pearls.

The types of pearl oysters are:

* Pinctada maxima

* Pinctada margaritifera

* Pinctada fucata

* Pteria penguin

While the pearl-producing mollusks in freshwater mussels produced by several types such as:

* Margaritifera margaritifera

* Hyriopsis cumingii

* Cristaria plicata