It can also occur as coarse granules. Pyrite is called fool's gold because its brassy yellow color is very similar to gold . Although it looks like gold, its other physical properties are very different.
Pyrite is harder, less dense, and more brittle.
However, pyrite is often associated with the presence of gold and copper, and locating fool's gold may mean the real thing isn't far off. Pyrite is the most common of the sulfide minerals and can be found worldwide. It's the most important source of sulfur after native sulfur. The mineral has a brassy yellow color. It tends to form in cubes.