A natural pearl, also known as a “moti” in some languages, is a rare and valuable gemstone that forms inside the soft tissue of a living mollusk, such as an oyster or clam. It is created when a foreign object, such as a piece of sand or a parasite, enters the mollusk’s body and irritates its soft tissue. In response, the mollusk secretes a substance called nacre around the irritant, layer by layer, until a pearl is formed.Natural pearls have been highly prized throughout history for their beauty and rarity. However, due to overfishing and pollution, natural pearls have become increasingly rare and expensive. Most pearls available in the market today are cultured pearls, which are created by intentionally introducing an irritant into a mollusk and then cultivating the pearl over time.