Know all about Shale and Rhyodacite properties here. All properties of rocks are important as they define the type of rock and its application. Shale belongs to Sedimentary Rocks while Rhyodacite belongs to Igneous Rocks.Texture of Shale is Clastic, Splintery whereas that of Rhyodacite is Earthy. Shale appears Muddy and Rhyodacite appears Skeletal. The luster of Shale is dull while that of Rhyodacite is greasy to dull. Shale is available in black, brown, buff, green, grey, red, yellow colors whereas Rhyodacite is available in black to grey, dark greenish - grey colors. The commercial uses of Shale are creating artwork, pottery and that of Rhyodacite are cemetery markers, creating artwork.