Goethite is a common iron oxide mineral that typically forms in soil and sedimentary environments. It is often found in shades of yellow, brown, or black and has a distinctive earthy appearance. Goethite is an important component of rust and is frequently associated with other minerals like hematite and limonite. This mineral plays a significant role in the formation of iron ore deposits, making it valuable for the mining industry. Goethite can also be used in pigments for paints and coatings due to its rich color. Its presence in soil can indicate the level of iron and influence plant growth.