Fragrance and perfume oils are going to cost less than essential oils because they are a lot easier to produce. To create essential oils, it takes a lot of raw plant material to get just a bottle of oil. Additionally, vigorous testing is required to ensure the quality of product. For example, Rose essential oil is distilled to gently release the delicate flower’s oil through steam. This also means that each 5 ml bottle requires 9.98 kilograms of rose petals, making Rose oil one of the most valuable essential oils you can acquire.