Precious as Pearl
Precious as Pearl
Most jewelry is fashioned out of precious metals and jewels that are found buried in the Earth, but pearls are found inside a living creature, an 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 basic anatomy.
Oysters are bivalves, which mean that its shell is made of two parts, or valves. The shell's valves are held together by an elastic ligament. This ligament is positioned where the valves come together, and usually keeps the valves open so the oyster can eat.
These are the parts of an oyster inside the shell:
- Mouth (pulps)
- Stomach
- Heart
- Intestines
- Gills
- Anus
- Abductor muscle
- Mantle
As the oyster grows in size, its shell must also grow. 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. It's kind of like the oyster getting a splinter. The oyster's natural reaction is to cover up that 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. Not all pearls turn out so well. Some pearls form in an uneven shape -- these are called baroque pearls. Pearls, as you've probably noticed, 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 slight nudge 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 doesn't have to be inserted.
While cultured and natural pearls are considered to be of equal quality, cultured pearls are generally less expensive because they aren't as rare. And nature pearls are popular all over the world. Many people think natural pearl pendant is a symbol of rich and status. And people are willing to spent money on buying it.
Questions and Answers
The Oyster Pearl is the most well-known of the pearl family, and is composed of nacre secreted over time by any number of varieties of Oyster to protect itself against irritation from an invading sand particle.
The pearl is one of the first gems to be valued by humans. The oyster makes a pearl in response to a stimulus - as part of its defense against an intrusion.
Pearl Stone is a great option to buy among all the precious gemstones. It is the birthstone of those born in the month of June. It has many medicinal and astrological benefits. Wholesale Pearl Gems are available in the market at a much affordable cost.
Pearls are classified as organic gem material. In the paste pearls have been very precious. Pearls are signifies the moon and considered to bring economic prosperity, increased family reputation, higher education and also mental peace.
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