The Historical Freshwater Pear Pearls that come from freshwater mussels are popularly known as freshwater pearls. A majority of freshwater pearls can be located in China, Japan, Scotland and the United States. The freshwater pearls are cultured in a mussel usually in a lake. They can also be found in rivers and streams. The trad... Similar Editorial : Historical Coffee by Ericslarkowski. | Source : Pear Photo