Kunzea oil ~ not necessarily a perfumery oil as it is astringent and bitter, along the lines of eucalyptus and tea tree, but gentler, not as medicinal. I add it here because is it lovely despite its obvious medicinal scent -- it possesses a lavender-like quality of softness, and peaky lemon notes as well. It is touted as a kind of miracle anti-infection oil, used to cure resistant staph and resolve sinus issues that may be related to mold or bacterial infection. I like it. I mean, I wouldn't want to put it on my skin because I don't want to smell like I spent an evening hanging out with a koala, but I would use it in a steam to help with recurrent sinus bugs.