Please tell me about pearls. Where are they found?

Pear ls are formed inside the shell s of certain m oll us ks , such as o yst ers and muss els . These m oll us ks are found in o ce ans and fresh water environments all over the world . Pear ls are typically found in shall ow waters , where the m oll us ks can easily be har v ested by divers or by using special ized equipment . Pear ls can also be cult med , which involves cultiv ating m oll us ks in controlled environments and then har vest ing the p ear ls once they are fully formed . </s>