Copal is a resin from a tree that is indigenous to Mexico, Guatamala and elsewhere in Central America. It is particularly identified with the aromatic resins used by the cultures of pre-Columbian Mesoamerica as ceremonially burned incense.
Copal is burned on a charcoal tablet, to enhance consecration, spell craft, exorcisms and banishings. It can also be powdered and added to other herbs to focus their energies and lend power. You can also get Copal incense, which is powdered copal in stick form.
Copal is still used by a number of indigenous peoples of Mexico and Central America as an incense and during sweat lodge ceremonies.