Know all about Rhyodacite and Oil 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 Oil shale belongs to Sedimentary Rocks.Texture of Rhyodacite is Earthy whereas that of Oil shale is Splintery. Rhyodacite appears Skeletal and Oil shale appears Muddy. The luster of Rhyodacite is greasy to dull while that of Oil shale is dull. Rhyodacite is available in black to grey, dark greenish - grey colors whereas Oil 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 Oil shale are an oil and gas reservoir.