The oyster on your plate most likely won’t have a pearl in it: Eating oysters come from the class of oysters called the Ostreid, while the kind that produces pearls belongs to Pterioida. The “pearls” created in the Chesapeake are rare, and they lack the pearlescense you may expect. Another little known fact is that most of the pearls found in jewelry are from clams and mussels – not oysters.