Absolute Oil

Absolute oils are extracted from flowers, leaves or bark. The majority of essential oils are produced  by the process of steam distillation. Some flowers, however, are too delicate for steam distillation (they get very damaged) and so their oils are more prolifically produced by extraction or enfleurage, as explained below. These oils are called absolute oils absolutes).
An absolute oil should not really be called an essential oil, it is an essence, it has a very high concentration of fragrance and a little goes a long way. An absolute oil is volatile, meaning it evaporates as opposed to a fixed oil which does not.  Absolute oils are generally more expensive to buy than steam distilled oils.