Large Shiny 11mm Peacock Blue Pearl Nugget BeadsPrice is per 15 inch string of these beautiful lustrous pearls. Each pearl will be a different size and shape, but the largest is about 11mm x 8mm. Beautiful shine! Cultured pearls Most pearls these days are cultured. These natural freshwater pearls occur in mussels for the same reason saltwater pearls occur in oysters. Foreign material inside a mussel can't be expelled. To reduce irritation, the mollusk coats the intruder with the same secretion it