To understand how pearls are formed in oysters, you must first understand an oyster's basic anatomy. 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...
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animals.howstuffworks.com/marine-life/question630.htm
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An old Arab legend tells us that pearls were formed when dew drops filled with moonlight fell into the ocean and were swallowed by oysters. The modern scientific explanation is not nearly as romantic but still quite fascinating. Fine natural pearls are quite rare. The Persian Gulf has always been the source of the...
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www.cwjewelers.com/stonepearls.htm
www.cwjewelers.com/stonepearls.htm
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Natural pearls are 100% 'pearl' or nacre. It is thought that natural pearls form under a set of accidental conditions when a microscopic intruder or grain...
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www.p-g-a.org/pearls.html
www.p-g-a.org/pearls.html
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Natural pearls are formed randomly and really are simple accidents of nature. When a certain type of irritant, such as a parasite, becomes lodged in the tissue of a mollusk, the animal responds by secreting a calcium carbonate substance called nacre to coat the intruder and protect the mollusk.
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www.pearl-guide.com/natural-pearls.shtml
www.pearl-guide.com/natural-pearls.shtml
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Jewelry question: How do natural pearls form? Not A Grain Of Sand To best answer this question it is important to point out how natural pearls do not form.
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wiki.answers.com/Q/How_do_natural_pearls_form
wiki.answers.com/Q/How_do_natural_pearls_form
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How pearls are formed and their various types There are essentially three types of pearls: natural, cultured and imitation. A natural pearl (often called an Oriental pearl) forms when an irritant, such as a piece of sand, works its way into a particular species of oyster, mussel, or clam.
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www.american.edu/TED/pearl.htm
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Pearls Exhibition | Cherished as symbols of purity and perfection, elegance and affluence, pearls are unusual gems, created inside living animals called mollusks. Occurring naturally in a wide range of sizes, shapes and colors, pearls have long captured the attention of scientists as well as socialites. In most pearls,
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www.amnh.org/exhibitions/pearls/what/form.html
www.amnh.org/exhibitions/pearls/what/form.html
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Now we see pearls almost as accessories, relatively inexpensive decorations to accompany more costly gemstones. Before the creation of cultured pearls in the early 1900s, natural pearls were so rare and expensive that they were reserved almost exclusively for the noble and very rich.
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www.pbs.org/wgbh/nova/pearl/time.html
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The natural pearl is formed as a protective reaction of the oyster, stimulated by a foreign object such as a grain of sand or even a small parasite intruding its sensitive inner tissue. Pearls are formed in shelled mollusc such as oysters, mussels, clams, conch and abalone living in freshwater as well as in the seas.
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www.lankalibrary.com/natural/pearl.htm
www.lankalibrary.com/natural/pearl.htm
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