Frankincense and myrrh are both resins, which are substances that are secreted by plants. They are used in many religious ceremonies and have been used for centuries as incense, perfume, and medicine. Frankincense is a gum-like RESIN that is derived from the Boswellia tree, while myrrh is a reddish-brown RESIN that comes from the Commiphora tree. Both of these resins have been used in religious ceremonies since ancient times.