Goethite

Goethite is a common natural mineral composed of iron and oxygen, with the chemical formula FeO(OH). It forms in environments where iron-rich liquids undergo oxidation, often giving soil and sediment a rusty or reddish-brown color. Goethite is an important iron ore, meaning it's a primary source of iron used in manufacturing. It appears in various forms, from fine powders to crystalline structures, and plays a role in Earth's natural recycling of iron. Its stability and distinctive color make it significant in geology, soil science, and mineral collection.