I don't have a green laser, but I just tried shining a 365nm UV torch on the various bottles of oil in my kitchen.
My good EV olive oil in a glass bottle goes a sort of pinkish colour. With the natural colour of the oil & the way the glass reflects/refracts light, it makes it look like copper.
I don't get the same effect with cheapo refined olive oil in a plastic bottle. I get a bit of fluorescence - the normal violet colour and much less than say a white piece of paper - but all or most of that is just from the container.
My good EV olive oil in a glass bottle goes a sort of pinkish colour. With the natural colour of the oil & the way the glass reflects/refracts light, it makes it look like copper.
I don't get the same effect with cheapo refined olive oil in a plastic bottle. I get a bit of fluorescence - the normal violet colour and much less than say a white piece of paper - but all or most of that is just from the container.