13x8x18-17x9x29mm White Souffle Freshwater pearls are cultured with a organic substance in the center which is removed when the pearl is harvested. This process leaves the large outer shape of the pearl intact, thick, and stable with a thicker nacre than a normal pearl. Souffle pearls have beautiful luster, show an iridescent orient, are well matched for color, show great quality on the strand, and have a near weightless heft allowing for a variety of jewelry options. AAA grade.