The rarest oil, besides Bulgarian Rose Otto Essential oil is Moroccan Argan Oil. I first heard of this oil from a customer of mine. She was selling this oil at very high prices. It cost much more than Nigella sativa and more even than olive oil. So why was this very rare beauty oil so expensive?
According to Natural News, " Argan oil is produced from the kernels of the tree and is one of the rarest and most expensive oils in the world. Berber women have used Argan oil for centuries to protect and nourish their skin, hair and nails from the harsh conditions in which they live. Now Argan oil is gaining popularity as a "miracle ingredient" in the Western beauty product industry. It has extremely high levels of Vitamin E and 80% fatty acids which make it perfect for healing many skin ailments as well as protecting against premature aging caused by oxidation."