Fool's Gold

This incredible nugget looks an awful lot like gold. Thankfully, however, it is not such a commonplace metal. In fact, this tiny nugget is extremely rare and is therefore very valuable. Scientifically known as Pyrite, it is referred to as "Fool's Gold" because more than once someone has traded in a handful of the stuff for a single wedge of cheese thinking it was mere regular gold.

There is no shortage of shop keepers around when Fool's Gold might accidentally trade hands and provide them with an early retirement.