Freshwater pearl mussel Freshwater pearl mussel The freshwater pearl mussel ("Margaritifera margaritifera") is an endangered species of freshwater mussel, an aquatic bivalve mollusc in the family Margaritiferidae. Although the name "freshwater pearl mussel" is often used for this species, other freshwater mussel species can also create pearls and some can also be used as a source of mother of pearl. In fact, most cultured pearls today come from "Hyriopsis" species in Asia, or "Amblema" species in North America, both members of the related family Unionidae; pearls are also found within species in the genus "Unio". The interior of the shell of "Margaritifera margaritifera"
The Pearl of Love and colder" "sense of colour", and, wearying "altogether of carvings and pictures and inlaid ornamentation", has them "put aside". The prince comes "to care . . . more and more" for "a great aisle" that permits "a vista" of, "the snowy wildernesses of the great mountain, the lord of all mountains, two hundred miles away." All who look upon the Pearl of Love are "exalted", yet the prince feels that, "The Pearl of Love had still something for him to do . . . before his task was done." He realizes that the problem is "a certain disproportion about the