Rosemary essential oil is exhilarating, penetrating, and activating. It is said to enhance mental clarity, concentration, memory, and creativity. This would be the perfect oil to diffuse while studying or preparing for some sort of a test of performing any sort of intellectually demanding pursuit. Rosemary is also known to rejuvenate the skin. It has antiseptic properties and is excellent for wounds and burns. It is also known to stimulate hair growth and in general to be beneficial to the scalp.