http://www.forrestrace.com/rose-pearl/
Cultured pearls and Natural Pearls
In 1910 a process was patented in Japan to create pearls with the help of the human hand. Kokichi Mikimoto led the Japanese cultured pearl growers in the development of this industry. Nowadays, practically all pearls are manufactured and cultured.
The way to properly manufacture a pearl requires one to inject a nucleus – a grain of sand – into an oyster. The oyster is then placed in water (saltwater or freshwater,) and is left there for any number of years. During this time, the rough, coarse surface of the nucleus causes much irritation to the interior of the oyster.
As a type of a defense mechanism, the oyster produces a substance which smothers the nucleus, forming a smooth round surface which enwraps this grain of sand. The oyster continues to do so as long the nucleus causes irritation. Years later, when the oyster is taken out of the water and pried open, a beautiful pearl is found.
This process is repeated in Australia, Tahiti, the Philippines, Japan, and China. The fact that these pearls are manufactured as opposed to naturally grown decreases their value, but it also enables many more people to enjoy their beauty and to have this magnificent luxury. Keishi pearls are accidents of the pearl’s culturing process. They form from oyster mantle that is attached to the mother-of-pearl bead that is inserted into the oyster. Keishi, always irregular in shape, occur in Japanese and South Seas culturing processes. Usually they are silvery, white or black in color; occasionally a fancy colored one is born.
Natural pearls, on the other hand, are pearls that follow the same process above, but with one difference. Natural pearls are created by a nucleus making its OWN way into the oyster. The nucleus is not injected; it naturally enters the oyster and causes the same irritation as it would were it injected. Natural pearls are exceptionally rare and valuable. Today natural pearl supplies have virtually ceased due to a lack of divers, oyster shortages and pollution. Occasionally new pearls are found but no steady supply exists. Natural pearls can be found in antique jewelry and sometimes are available at auctions.
Being very rare, there are not many examples of natural pearl jewelry left in the world. However, some natural pearl beds are being harvested in the Persian Gulf area, as well as some freshwater sites in the United States. In the end, though, the increasingly popular cultured pearl will be the main source of pearl jewelry around the world due to its lower cost and abundance.
About the Author
The Pearl Source was officially established in 1991 in the Jewelry District of Los Angeles as one of the first direct importers and wholesalers of loose pearls in the United States. Today, The Pearl Source is a supplier of Tahitian, South Sea, Freshwater and Akoya pearls and also specializes in creating exquisite pearl necklaces and pearl earrings
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