I was curious about this too so I poked around a little. There are sweet almonds and bitter almonds. Sweet almonds are much richer in oils and this is what would most likely be used to make any product that isn't crazy expensive and comes in any container larger than a couple oz. Bitter almonds are used mostly for their fragrance (which apparently smells like maraschino cherries). Not sure but it may be an industry standard to assume when talking about oiling almonds that you would just always use sweet almonds. Anyway if it's just labeled Almond oil and smells nutty and earthy and isn't a bazzilion bucks it's likely to be sweet almond oil.