Here are a few world coins that I picked up over the weekend at a local coin show.  
The 1766 Russian 5 Kopeks is a really thick and heavy copper coin, it is on a regular 2x2 to show how thick the edge is.
The 1943 steel penny had some pretty cool toning, so i picked it up.  The picture doesn't really do it justice, but it's the best I could get with the phone camera.