Hi JoeyA,
This isn't really a direct answer because I don't know what company you are buying from. I would think, if you are buying from a reputable company, and the lable says "100% essential oil" pressed or distilled, than that's what you're getting, a natural product. It's your choice whether to use organic or not. Essential Oils should be 100% natural, unless they state they are a blend of some sort. Be wary of who you buy from though, I've seen 100% Pure Vanilla EO being sold (which doesn't exist) and even Strawberry EO, which is just plain silly!
Goes to show, anyone can put anything on a lable.
Plus, Certified Organic doesn't always mean more natural or better than. A product can be 100% natural, and just as good or even better than Certified Organic. An example: My humble little mushroom farm. I don't use anything except harvested spore, and logs I have cut down on my own farm. By the highest standards, my mushrooms would be "organic" however, I do not bring in enough revenue to pay for the government "certification"