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