Germanium is the only metal (or metalloid to be exact) that looks green. Just a slight tinge mind you, a yellow-green highlight when you look at it just right, but definitely there when you compare it side by side to your typical gray looking ordinary metal. It's a fetching sight to see a rock shaped object that is as reflective as the most well-polished mirror.

Here we offer pure germanium “rocks” in an attractive screw-top round container. The piece shown weighs five grams which nearly fills the container.