Translations:AY Honors/Shells - Advanced/Answer Key/113/en
From Pathfinder Wiki
Nacre, also known as mother of pearl, is an organic-inorganic composite material produced by some molluscs as an inner shell layer. It is exceptionally strong, resilient, and iridescent. Nacre is found in some bivalves, some gastropods and some cephalopods. The inner shell layer in most molluscs however is merely porcellaneous, in other words shiny like a china plate, not iridescent.
