Having an art gallery, I see a lot of art. Being a numismatist, I notice anything with coins. This struck me as pretty awesome.
Cannon Ball by Jason de Haan. It purportedly contains one coin from each of the world's actively circulating currencies. I'll have to contact him and get the list he used.
I guess this would be post mint damage though
http://www.jasondehaan.net/Site/Jas...n_Ball).html