Yes, I was quite surprised to find it was mined in Poland.
Me too, I didn't even know there were opals in Poland! lol
They were mined, but not anymore - the mine was closed in the 80's or 90's, I think. Now that mine and that area is a tourist attraction for geology enthusiasts, because it's a pretty rare place in Europe apparently (that area has 81 types of minerals).
I didn't realise you had collected them!
I don't, that's not my footage :)