Know all about Oil shale and Rhyodacite properties here. All properties of rocks are important as they define the type of rock and its application. Oil shale belongs to Sedimentary Rocks while Rhyodacite belongs to Igneous Rocks.Texture of Oil shale is Splintery whereas that of Rhyodacite is Earthy. Oil shale appears Muddy and Rhyodacite appears Skeletal. The luster of Oil shale is dull while that of Rhyodacite is greasy to dull. Oil 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 Oil shale are an oil and gas reservoir and that of Rhyodacite are cemetery markers, creating artwork.