Do Pearl earrings come from echinoderms?

No, pearl earrings do not come from echinoderms. Pearls are formed by mollusks, primarily oysters and some species of mussels, in response to irritants or foreign substances entering their shells. Echinoderms, such as starfish and sea urchins, do not produce pearls. Instead, they are a distinct group of marine animals with different biological processes.