Know all about Oil shale and Ijolite 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 Ijolite belongs to Igneous Rocks.Texture of Oil shale is Splintery whereas that of Ijolite is Earthy, Granular. Oil shale appears Muddy and Ijolite appears Banded and Foilated. The luster of Oil shale is dull while that of Ijolite is greasy to dull. Oil shale is available in black, brown, buff, green, grey, red, yellow colors whereas Ijolite is available in brown, buff, cream, green, grey, pink, white colors. The commercial uses of Oil shale are an oil and gas reservoir and that of Ijolite are cemetery markers, creating artwork.