Know all about Rhyodacite and Arkose properties here. All properties of rocks are important as they define the type of rock and its application. Rhyodacite belongs to Igneous Rocks while Arkose belongs to Sedimentary Rocks.Texture of Rhyodacite is Earthy whereas that of Arkose is Clastic. Rhyodacite appears Skeletal and Arkose appears Rough and Dull. The luster of Rhyodacite is greasy to dull while that of Arkose is dull. Rhyodacite is available in black to grey, dark greenish - grey colors whereas Arkose is available in reddish brown colors. The commercial uses of Rhyodacite are cemetery markers, creating artwork and that of Arkose are in aquifers, soil conditioner, source of magnesia (mgo), tombstones.