No, pearls are not eggs. Pearls are formed inside mollusk shells and are made of a substance called nacre, which is secreted by the mollusk as a protective coating around a small irritant that enters its shell. Eggs, on the other hand, are reproductive cells produced by animals and plants.
Some people may think that pearls are eggs because both pearls and eggs come from creatures that live in water and both pearls and eggs are often round in shape. Additionally, pearls can be found inside mollusk shells, which are sometimes referred to as "pearl oysters" or "pearl mussels." This association with the word "oyster" may further contribute to the confusion that pearls are eggs.