Pearl -

To protect itself, the mollusk secretes nacre , also known as mother-of-pearl. This substance is a complex composite of aragonite (a calcium carbonate mineral) and conchiolin (an organic protein glue). The animal coats the irritant in layer after layer of this nacre. Over time—often several years—these microscopic layers build up, refracting light to create the gem’s signature iridescent glow, known as .

Pearls are formed within the soft tissue of a mollusk, typically a oyster or mussel. The process begins when an irritant, such as a grain of sand or a parasite, enters the mollusk's shell and lodges itself in the tissue. In response, the mollusk secretes layers of nacre, a shiny substance composed of calcium carbonate and conchiolin, to coat the irritant and protect its soft body tissue. Over time, the layers of nacre build up, forming a pearl. To protect itself, the mollusk secretes nacre ,

Pearls have played a significant role in various cultures throughout history. In many Asian cultures, pearls are believed to possess spiritual and healing properties, while in Western cultures, they are often associated with purity, innocence, and wisdom. In some cultures, pearls are also seen as a symbol of good luck, prosperity, and longevity. In response, the mollusk secretes layers of nacre,

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