The scientific name of the mabe shell, the mother shell of mabe pearls, is "Pteria penguin." Pteria comes from the Greek word for "wing," so the scientific name means "wing of the penguin bird." This is because the shape of the mabe shell when opened resembles a penguin spreading its wings. Mabe is the largest of the pearl oysters in Japan, and it lives in tropical to subtropical regions, mainly from Amami Oshima to Okinawa in Japan. They live in fast-flowing currents, attaching themselves to reefs and corals near capes. Because their population is small and they live in areas with strong currents that are difficult for even fishermen to reach, it is very difficult to collect natural shells, and their rarity has earned them the nickname "phantom pearl." A major characteristic of mabe pearls is that they are semi-circular. Because mabe shells live in strong currents, their bodies are very muscular. Therefore, there is no room in the tissue that surrounds the nucleus, and even if a nucleus is inserted, it is quickly expelled. Thus, the nucleus is adhered to the inside of the shell to prevent it from being expelled, and it is cultured. Therefore, the pearl becomes semi-circular due to the adhesion surface. However, the greatest appeal of mabe pearls is, above all, their beautiful luster. The following gifts will be given to those who purchase: ・1 silver polish cloth ・Accessory box Please note that the color in the image may differ from the actual product due to the photography and the environment of the device you are using. Thank you for your understanding.