Know all about Shale and Nephelinite properties here. All properties of rocks are important as they define the type of rock and its application. Shale belongs to Sedimentary Rocks while Nephelinite belongs to Igneous Rocks.Texture of Shale is Clastic, Splintery whereas that of Nephelinite is Aphanitic. Shale appears Muddy and Nephelinite appears Skeletal. The luster of Shale is dull while that of Nephelinite is vitreous to metallic. 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 Shale are creating artwork, pottery and that of Nephelinite are creating artwork, soil conditioner, source of magnesia (mgo).