Copal is a tree resin, particularly the aromatic resins from the copal tree Protium copal (Burseraceae) used by the cultures of pre-Columbian Mesoamerica as ceremonially burned incense and for other purposes.[1] More generally, copal includes resinous substances in an intermediate stage of polymerization and hardening between "gummier" resins and amber.[2] Copal that is partly mineralized is known as copaline.
It is available in different forms; the hard, amber-like yellow copal is a less expensive version, while the milky-white copal is more expensive.[citation needed]