The word “pinal” is Spanish and means “pine forest.” “Amoles” is from the Nahuatl “amolli” – a name of a root often used as a detergent. The municipality's seal contains an “amilli”, along with an eagle with its wings extended to signify hospitality. There are branches and four pine cones to represent the various conifers that grow abundantly in the area, the Cerro de Media Luna mountain and a pick and shovel to represent the area's past of mining silver, mercury, gold, antimony and other metals. A cross and sword represents the Spanish conquest and evangelization. The date of 1932 signifies the establishment of the municipality. The date of 19 March 1606 represents the founding of the Spanish town.