Know all about Rhyodacite and Dunite properties here. All properties of rocks are important as they define the type of rock and its application. Rhyodacite and Dunite belong to Igneous Rocks.Texture of Rhyodacite is Earthy whereas that of Dunite is Phaneritic. Rhyodacite appears Skeletal and Dunite appears Rough and Shiny. The luster of Rhyodacite is greasy to dull while that of Dunite is shiny. Rhyodacite and Dunite are available in black to grey, dark greenish - grey colors. The commercial uses of Rhyodacite are cemetery markers, creating artwork and that of Dunite are creating artwork, gemstone, jewelry, source of chromite, platinum, nickel and garnet, source of diamonds.