Chemical Formula: FeS2
Color: Yellow or yellowish gray
Importance: Most often used as a gemstone or is kept by collectors. Is also a minor ore of iron and sulfur. Sulfur from pyrite is used in fertilizers, matches, medicines, gunpowder, and fireworks. Iron from pyrite is found in most alloys, especially stainless steel, and in magnets.
Other Interesting Information: Because of its color, miners often mistake pyrite for pure gold. For this reason, it is often called “Fool’s Gold.”
My Take: I personally enjoy pyrite. It often makes cool shapes and large crystals, which makes it one of the more interesting minerals to examine.
For More Information: http://www.minerals.net/mineral/pyrite.aspx