How are pearls obtained? - Vidyadip

Question

How are pearls obtained?

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Answer

Pearls are formed when a foreign particle such as a grain of sand or a small particle of rock accidentally enters the space between the mantle and shell of an oyster’s body.
Oysters cannot reject the particle, and as a defence mechanism its produces a shining coating called nacre on the particle layer by layer.
As the shiny layers get added, a pearl is formed.
Cultured pearls are artificially formed by inserting a bead in oyster shell and allowed to coat it with nacre over several years.

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