Question

How the pearl formation take place?

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 isformed.

Answer 2

Natural Pearls form when an irritant - usually a parasite and not the proverbial grain of sand - works its way into an oyster, mussel, or clam......

As a defense mechanism, a fluid is used to coat the irritant.......

Layer upon layer of this coating, called 'nacre', is deposited until a lustrous pearl is formed......