Rocks are naturally occurring solids which are composed of minerals & have been used by humans since ages. From Stone Age, rocks are used for various purposes. Also, the metals and minerals found in rock play an important role in our life. Get to know all the Dunite Uses. We have provided you with all information about Dunite rock here. Dunite is a green to brownish coarse-grained igneous rock mainly consisting of olivine. Dunite is available in dark greenish - grey colors. The streak of a rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Dunite is white. Get to know more about Dunite rock and characteristics of Dunite rock in the next sections.