Most jewelry is long-established out of precious metals and jewels which might be found buried in the earth, but pearls are discovered inside a residing creature, an oyster. Pearls are the results of a biological process – the oyster’s way of protecting itself from foreign substances. Oysters usually are not the only type of mollusk that may produce pearls. Clams and mussels can even produce pearls, however that may be a much rarer incidence. Most pearls are produced by oysters in both freshwater and saltwater environments. To grasp how pearls are formed in oysters, you have to first understand an oyster’s primary anatomy. The shell’s valves are held collectively by an elastic ligament. This ligament is positioned where the valves come together, and usually keeps the valves open so the oyster can eat. What Are the Parts of an Oyster? How Are Pearls Formed Inside an Oyster? What Are the Parts of an Oyster?