I put together a quick video discussing just how much gold and silver have been mined/refined in human history. I'm sure most of you know that compared to other metals, it's really not that much. http://www.youtube.com/watch?v=asodfnJbPR8 I know that especially for silver, much of it has been refined has been used for non-recoverable/insanely difficult to recover purposes, so realistically one couldn't make a cube like the one I'm suggesting, but oh well Hopefully some of you will like it. Mods, feel free to move or delete this thread if inappropriate. Sorry I'm new.