Know all about Oil shale and Theralite 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 Theralite belongs to Igneous Rocks.Texture of Oil shale is Splintery whereas that of Theralite is Phaneritic. Oil shale appears Muddy and Theralite appears Veined and Shiny. The luster of Oil shale is dull while that of Theralite is waxy and dull. Oil shale is available in black, brown, buff, green, grey, red, yellow colors whereas Theralite is available in dark grey to black colors. The commercial uses of Oil shale are an oil and gas reservoir and that of Theralite are cemetery markers, commemorative tablets, creating artwork, laboratory bench tops, jewelry, sea defence, tombstones.