This type of precious ornament, which could be made in metal or obsidian, or in rock crystal, was inserted into the lower lip through a hole made above the chin. The curved part was shaped so that it would rest against the gum. The head of the bird of prey, which is made with great realism, emerges from a crown of little spheres which divide the plain functional part from the ornamental part outside. In Mexican culture, these decorations were the prerogative of dignitaries and high-ranking warriors. This specimen was probably made by Mixtecan craftsmen, a population conquered and exploited by the Aztecs for their skills. The diverse works of the Mixtecs ranged from illustrated books to polychrome ceramics, to jewels in gold and hardstone.