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How pearls get their perfect spherical shape

The mystery of how pearls form into the most perfectly spherical large objects in nature may have an unlikely explanation.

india Updated: Jun 20, 2013 23:44 IST

The mystery of how pearls form into the most perfectly spherical large objects in nature may have an unlikely explanation.

Julyan Cartwright, Antonio G Checa and Marthe Rousseau 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.

Pearls develop as nacre (mother of pearl) and other liquids accumulate around grains of sand.