Know all about Comendite and Oil shale properties here. All properties of rocks are important as they define the type of rock and its application. Comendite belongs to Igneous Rocks while Oil shale belongs to Sedimentary Rocks.Texture of Comendite is Porphyritic whereas that of Oil shale is Splintery. Comendite appears Foliated and Oil shale appears Muddy. The luster of Comendite and Oil shale is dull. Comendite is available in blue, bluish - grey colors whereas Oil shale is available in black, brown, buff, green, grey, red, yellow colors. The commercial uses of Comendite are cemetery markers and that of Oil shale are an oil and gas reservoir.