Question

how does pearl formation take place in oyster

Answer 1

In order to protect itself from irritation, the oyster will quickly begin covering the uninvited visitor with layers of nacre — the mineral substance that fashions the mollusk's shells. Layer upon layer of nacre, also known as mother-of-pearl, coat the grain of sand until the iridescent gem is formed.

Answer 2

Answer:

Freshwater mussels and marine oysters produce pearls as a natural defence against irritants like parasites getting inside their shells or harm to their delicate bodies.

Explanation:

As the oyster grows in size, so must its shell. The mantle is an organ that uses minerals from the oyster's food to produce the shell. Nacre is the material formed by the mantle. The inside of the shell is lined with nacre.

A natural pearl is formed when a foreign substance enters the oyster between the mantle and the shell and irritates the mantle. It's similar to the oyster getting a splinter. To protect itself, the oyster's natural reaction is to cover up the irritant. The irritant is covered by layers of the same nacre substance that is used to make the shell. This eventually results in the formation of a pearl.

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