Pyrite, often called "fool's gold," is a shiny, metallic mineral that resembles real gold. Its chemical composition is iron sulfide, which gives it a distinctive brassy yellow color. Pyrite is commonly found in sedimentary rocks and can form in various geological environments. While it may look valuable, it is not a precious metal and is primarily used in the production of sulfuric acid and as a source of sulfur. Despite its lack of monetary value, pyrite has fascinated people for centuries. Many collectors enjoy its unique appearance, and it is sometimes used in jewelry. Additionally, pyrite can be an indicator of the presence of gold in certain geological formations, making it of interest to miners and geologists alike.