So how do you mean, when you say 'inside something'? Do you include both alloys and enclosed in gas cylinders? I think a cylinder full of helium is 'pure, separate', personally.

I have one that's fairly similar, heavier in the metals and lower in the inerts, but it's helped by inheriting my father's similar collection. I was also lucky insofar as I was standing in the lobby of the chem building talking to a prof when a grad student came by with a whole rolling desk filled with stuff marked 'trash', which is how I came by a big bottle of nickel chunks, some indium, chromium, and manganese. I also worked for this weird place that was doing physical vapor deposition of copper by boiling it adjacent to the target, in these solid tungsten resistance bars, and grabbed a couple of them when they wore out -- so that's really a mix of tungsten and oxygen but since it's several pounds, I'm going to count it.
It'd be awfully neat to get a big chunk of boron or beryllium some day.