Greenstone and serpentine axe heads were primarily encountered in ceremonial contexts at Zacpetén. These objects were symbols of lightning and often associated with God K, a deity closely related to power and dynastic descent (Taube 1992: 69-79). Chak, the rain deity, frequently carries one of these objects in Maya codices (Villacorta and Villacorta 1930: 74). They are found in the eye of the head variant glyph for the number six. Stone axes heads are also mentioned as a form of currency in the Contact period (Thompson 1970: 138).