Small heads and figures made of greenstone, so-called "penates", which represent the god Tlaloc or at least have some of Tlaloc's attributes, are a common type in Mixtec culture. They were used as amulets. Similar figures were also found among the artefacts from the Templo Mayor. The greenish colour symbolises the colours of the Tlaloc, which is responsible for water, rain and fertility. (V. König, 2003)