Know all about Oil shale and Nephelinite 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 Nephelinite belongs to Igneous Rocks.Texture of Oil shale is Splintery whereas that of Nephelinite is Aphanitic. Oil shale appears Muddy and Nephelinite appears Skeletal. The luster of Oil shale is dull while that of Nephelinite is vitreous to metallic. Oil shale is available in black, brown, buff, green, grey, red, yellow colors whereas Nephelinite is available in black, brown, colourless, green, grey, white colors. The commercial uses of Oil shale are an oil and gas reservoir and that of Nephelinite are creating artwork, soil conditioner, source of magnesia (mgo).