– Agarwood oil is also commonly known as oud oil, is one of the most expensive essential oils in existence today. Also, sometimes called Aloeswood. The essential oil is derived from the heartwood of the agarwood tree.
There are many grades of Agarwood oil. The quality of grade is dependent on the grade of wood used and the length of distillation. Typically, the longer the distillation time the higher the grade.