Rosemary oil is an essential oil derived from the leaves of the rosemary plant (Rosmarinus officinalis). It has been used for centuries for its aromatic and medicinal properties. Some of the specialties of rosemary oil. Rosemary oil is often used in hair and scalp care products due to its ability to stimulate hair growth, reduce dandruff and dry scalp, and improve hair texture and shine. Overall, rosemary oil has a wide range of specialties and is used in various industries including aromatherapy, hair and skin care, culinary, and medicine.