HOW TO TEST OLIVE OIL:
Additionally, you can also test the olive oil you have at home. You should put the bottle in the fridge for half an hour, and if it starts to solidify, it means that the oil is pure, as it contains a large amount of monounsaturated fat.On the other hand, if it does not solidify, it is fake. Yet, just to be sure, look for official governmental seals of approval on the label, like “Australian Extra Virgin Certified” and “California Olive Oil Council Certified Extra Virgin.”
The premise behind this test is that extra-virgin olive oil is comprised of mostly monounsaturated fats which solidify when cold. So, if you put real extra-virgin olive oil in the fridge, it ought to become thick and cloudy.