34 Huge 12mm to 13mm Lustrous White PearlsPrice is per 15 inch string of these massive lustrous pearls. Totally white (unlike picture). Largest is a big 12. 5mm about 34 to the string. As picture just a little grooving to show natural. 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