20.What correctly defines “mother of pearl”? [A] An oyster which yields the pearl [B] A special large sized pearl found in japan [C] A hard iridescent substance forming the inner layer of certain shells [D] Female individuals of certain species of shelled mollusk Show Answer
Nacre, also known as the mother of pearl, is an organic-inorganic composite material produced by some molluscs as an inner shell layer; it also makes up the outer coating of pearls. It is strong, resilient, and iridescent.
