The under side of the shell is covered with very beautiful and shiny mother-of-pearl and extremely thin slices of this are used as material for craftwork such as raden (shell inlay) work.
また、殻の裏側には非常に美しい真珠光沢があり、ごく薄く切り出したものを螺鈿細工などの工芸材料に用いる。