how does pearl formation take place oysters
Answers
Answer:
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.
Explanation:
Answer:
Oysters make pearls in response to an irritant, such as a grain of sand or another object. When any irritant makes its way between the mollusk's shell and mantle, the creature produces nacre, a protective coating that helps reduce irritation. Nacre is also referred to as mother-of-pearl; it's made of microscopic crystals of calcium carbonate, and it also lines the interior of a mollusk's shell.
Layers of nacre coat the irritant, eventually forming an iridescent gem (the pearl).
The only difference between naturally developed pearls and cultured pearls is that, with cultured pearls, a pearl farmer embeds an irritant between the shell and the mantle by cutting into the mollusk's tissues. With freshwater pearls, irritants do not need to be introduced. S imply cutting the oyster's soft tissues is enough to begin the pearl-making process.