Re: Has anyone seen a normal size mercury ingot?
@KAMNU Yes, I've seen smelted mercury ingots, even though, as you mentioned, they wouldn't exist in real life. I believe I found the ingots in World Adventure tombs.
When you receive additional ingots in the mail, it's always just additional items of the same metal you sent to be smelted. So if you sent away one mercury raw ore, you might get back three vials of mercury instead of one, but I don't think you would get any ingots. I don't think I ever got them through the mail either.