They're not like the oils we think of, like olive oil or almond oil. I would say they are almost like the life blood of a plant. It comes from the stems, the leaves, or the flowers. Not every plant has an essential oil, and not every plant's oil is extracted in the same way. Lavender is pressed from the flowers. There are three different oils that come from orange. One is from the flowers (if you are using that one, it could be very expensive because you not getting oranges if you are crushing the blooms), one is from the stems, and one is made from the twigs of different kinds of orange trees.
