I purchased 1/6th ounce bottles of Hyacith Absolute and 2 1/6th ounce bottles of Magnolia Absolute essential oils, and these were undoubtedly legitimate and well done oils!!! Unbelievably strong where you must be careful, to start with only 1 yes i ssid 1 drop of these essential oils, if diffusing in your electric oils diffuser!!! I always worry about purchasing essential oils from a company of new with buying from, but i can say with 100% assurance, High Altitude Essential Oils are for certain, of the highest quality, undoubtedly! I diffused one drop of Magnolia, but even that was too strong, so I recommend making a dillution of 10% in a proper liquid that is adequate, so you can enjoy your oils diffused better. I will buy again from them and highly recommend to anyone looking for quality essential oils. Thank you.