noun
tortoiseshell work; article of tortoise shell
Refers to decorative items or craftsmanship made from tortoiseshell, a traditional Japanese art form.
この鼈甲細工の櫛はとても高価だ。
This tortoiseshell comb is very expensive.
祖母は鼈甲細工の帯留めを大切に
My grandmother treasures her tortoiseshell obi clip.