The Ossa Sepia bowl, which serves as the back shoulder for the common squid (sepia cuddlefish), has a hard horn-like outer skin and a lamella-like interior, which consists of soft layers of lime. Due to its special structure, it is ideal as a casting mold. The fingerprint-like lamel texture of each bone is unique and remains in the cast. The shell burns during the pouring process, which is why each casting peace is one of a kind.