Waitrose don't actually tell you what "pure" means. It's not organic and I'm not sure about mineral oil. However it has sweet almond oil, vitamin E, peach kernal oil and olive oil.
I have very dry skin and it worked well for me. It absorbs quickly, hydrates and leaves skin nicely glowing.
You get 30ml for very little money.
The packaging is also great. A clean glass bottle with a very functional pipette.