1. a yellowish-brown to dark brown iron oxide mineral that is a common component of rust and iron ore
Usage: geology; mineralogy

Examples

• The geologist identified goethite crystals in the rock sample.
• Goethite forms when iron-bearing minerals are exposed to oxygen and water.
• The rusty color of the cliff face was due to goethite deposits.
• Mining companies extract iron from goethite-rich ores.
• The mineral collection included specimens of goethite and hematite.
• Goethite is named after the German writer Johann Wolfgang von Goethe.