Pyrite, often called "fool's gold," is a mineral composed of iron sulfide (FeS₂). It has a metallic luster and a pale brass-yellow color, which can easily be mistaken for real gold. Pyrite is commonly found in sedimentary rocks and can form in various geological environments, including hydrothermal veins and coal beds. This mineral is not just an attractive specimen; it has practical uses as well. Pyrite can be used in the production of sulfuric acid, an important chemical in various industries. Additionally, it is studied for its potential in renewable energy applications, such as solar cells and batteries.