Sailor's valentine
A sailor's valentine is a form of shellcraft, a type of mostly antique souvenir, or sentimental gift made using large numbers of small seashells. Sailor's valentines are typically octagonal, glass-fronted, hinged wooden boxes ranging from 8 to 20 inches (20 to 51 cm) in width, displaying intricate symmetrical designs composed entirely of small sea shells of various colors glued onto a backing.