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