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The science, history and more of pearls.
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Researchers Try to Explain How Perfectly Round Pearls Form

Researchers Try to Explain How Perfectly Round Pearls Form | Pearl School | Scoop.it

Pearls develop as nacre and other liquids accumulate around grains of sand or other foreign objects inside certain oysters and other shellfish.

“But how do pearls grow into such perfect spheres?”

 

Dr Julyan Cartwright from the CSIC – Universidad de Granada in Spain and colleagues point out that the most flawless and highly prized pearls have perhaps the most perfectly spherical, or ball-like, shape among all the objects in nature that are visible without a microscope. “The answer may be relatively simple — with developing pearls having a saw-toothed, or ratchet-like, surface,” Dr Cartwright and his colleagues said.

 

That texture generates forces that make the pearl turn inside the oyster’s tissues in response to movements in the environment.

 

“The result is a spherical build-up of nacre and other textures. Rotating pearls are a perhaps unique example of a natural ratchet,” the scientists concluded.


Via David Simpson, Dr. Stefan Gruenwald, India Rows of The Pearl Girls
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The Creation of Pearls

TWEET IT - http://clicktotweet.com/41egD Ever wonder where that pretty pearl necklace came from? Even though most of us already know that oysters produce pea...
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Australia to protect wrecked Japanese pearl ship

Australia to protect wrecked Japanese pearl ship | Pearl School | Scoop.it
SYDNEY, New South Wales — A Japanese pearling ship which has lain on the ocean floor off northern Australia for more than 70 years will be protected for its historical significance, the government said Sunday.
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