Yes, if only. I continually hear that much olive is not what it is supposed to be and it seems that authorities empowered to do something about this don't do much to stop it or perhaps they're fighting an uphill battle. In general the higher the price, the more likely the product is 100% genuine. The logic here might be that there's not that much profit in adulterating pricey oil selling rather limited quantities.
For a technical delve into olive oil fluorescence: https://cdn.intechopen.com/pdfs/27027/InTech-Analysis_of_oli...