Rosa Damescena. Origin: Morocco. Plant part: Petals. This oil is red to brown and has the earthy fresh scent of roses in bloom. Rose is one of the most expensive oils. A few drops will go a long way so even a small bottle will last for a while. The extraction of this oil is done through a solvent extraction from the fresh petal, requiring up to 5000 pounds of petals to make 1 pound of essential oil. Certificate of Analysis is available upon request. For external use only.