Pinctada fucata

Pinctada fucata, commonly known as the pearl oyster, is a marine bivalve mollusk valued for its ability to produce pearls. These oysters, found in temperate and warm coastal waters, belong to the family Aviculidae. The pearl-making process begins when a foreign particle, such as sand or a parasite, enters the oyster's shell. To protect itself from this irritant, the oyster's mantle tissue secretes nacre, or mother-of-pearl, around the particle. Over time, layers of nacre build up, forming a pearl. While edible oysters produce lustreless pearls, certain species, like Pinctada fucata, yield fine pearls. The Japanese perfected the cultivation of pearls by introducing a mother-of-pearl bead into the mollusk, leading to the production of whole, nacreous pearls.12345