This listing is for various lot sizes of 0.70", 28-line, 18mm Akoya Mother of Pearl Shell Buttons. The bulk picture shows one gross of buttons (144 buttons). You will get buttons similar to the ones shown in the picture, but not the exact lot shown. These shell buttons are made from saltwater mother of pearl. They have two holes. They are sometimes called agoya shell buttons. These are fashion quality buttons that are perfect for seamstresses, designers, dry cleaners, and a multitude of craft projects. Made in South Korea. Genus and species: Pinctada fucata.