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Live Trading News > Blog > Lifestyle > Luxury > How Oysters Make Pearls
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How Oysters Make Pearls

Paul Ebeling
Last updated: June 21, 2021 10:30 pm
Paul Ebeling
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#oysters #pearls

Most jewelry is fashioned out of precious metals and jewels that are found buried in the Earth, but pearls are found inside a living animal: The Oyster. Pearls are the result of a biological process, the oyster’s way of protecting itself from foreign substances.

Oysters are not the only type of mollusk that can produce pearls. Clams and mussels can also produce pearls, but that is a much rarer occurrence. Most pearls are produced by oysters in both freshwater and saltwater environments.

To understand how pearls are formed in oysters, you must first understand an oyster’s anatomy.

Oysters are bivalves, which means that its shell is made of 2 valves. The shell’s valves are held together by an elastic ligament. This ligament is positioned where the valves come together, and keeps the valves open so the oyster can eat.

As the oyster grows in size, its shell must grow too.

The mantle is an organ that produces the oyster’s shell, using minerals from the oyster’s food. The material created by the mantle is called nacre. Nacre lines the inside of the shell.

­The formation of a natural pearl begins when a foreign substance slips into the oyster between the mantle and the shell, which irritate­s the mantle. The oyster’s natural reaction is to cover up the irritant to protect itself. The man­tle covers the irritant with layers of the same nacre substance that is used to create the shell. This eventually forms a pearl

So, a pearl is a foreign substance covered with layers of nacre.

Most pearls that we see in jewelry stores are nicely rounded objects, which are the most valuable ones. But, not all pearls turn out so well. Some pearls form in an uneven shape called baroque pearls. 

Pearls come in a variety of various colors, including white, black, gray, red, blue and green. Most pearls can be found all over the world, but black pearls are indigenous to the South Pacific.

Cultured pearls are created by the same process as natural pearls, but are given a push by pearl harvesters.

To create a cultured pearl, the harvester opens the oyster shell and cuts a small slit in the mantle tissue. Small irritants are then inserted under the mantle.

In freshwater cultured pearls, cutting the mantle is enough to induce the nacre secretion that produces a pearl, an irritant does not have to be inserted.

While cultured and natural pearls are considered to be of equal quality, cultured pearls are generally less expensive because they are not as rare. ­

Have a happy day, Keep the Faith!

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By Paul Ebeling
Paul A. Ebeling, a polymath, excels, in diverse fields of knowledge Including Pattern Recognition Analysis in Equities, Commodities and Foreign Exchange, and he is the author of "The Red Roadmaster's Technical Report on the US Major Market Indices, a highly regarded, weekly financial market commentary. He is a philosopher, issuing insights on a wide range of subjects to over a million cohorts. An international audience of opinion makers, business leaders, and global organizations recognize Ebeling as an expert.   
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