Dunite is a type of ultramafic rock primarily composed of the mineral olivine. It is typically greenish in color and has a coarse-grained texture. Dunite forms in the Earth's mantle and is often associated with peridotite, another ultramafic rock. Due to its high olivine content, dunite is less common than other igneous rocks. Dunite can be found in various geological settings, including ophiolite complexes and mantle xenoliths. It is significant in the study of mantle geology and can provide insights into the composition and processes of the Earth's interior. Additionally, dunite is sometimes mined for its olivine, which has industrial applications.