Hand cut lead crystal dish

I've got this relish dish on estate auction, together with more crystal glass items. I think this is the most beautiful from the bunch. I don't know much about lead crystal, despite my late mum fondness for it. I think this is Czech crystal dish, but of course I might be wrong. One old lady said to me she can recognise Bohemian glass because of the minerals in it. I don't know how she does it, I can't see any difference. So I would like to ask the more knowledgeable ones what they think about this dish. It must be vintage, it has lots of slight scratches on the bottom.