These are natural shell buttons (black butterfly, round top). * 50 pieces for 799 yen * Also available: 30 pieces for 699 yen The black butterfly shell has a unique rainbow color that changes depending on the light and viewing angle. These genuine buttons have a different texture than regular polyester buttons. They are used in brand-name products. ☆ Due to shipping, buttons may occasionally break, so extra buttons are included. #buttons #shell buttons #accessory parts #handmade #bulk sale