Know all about Claystone and Nephelinite properties here. All properties of rocks are important as they define the type of rock and its application. Claystone belongs to Sedimentary Rocks while Nephelinite belongs to Igneous Rocks.Texture of Claystone is Clastic whereas that of Nephelinite is Aphanitic. Claystone appears Rough and Dull and Nephelinite appears Skeletal. The luster of Claystone is dull while that of Nephelinite is vitreous to metallic. Claystone is available in black, blue, brown, green, grey, orange, red, white, yellow colors whereas Nephelinite is available in black, brown, colourless, green, grey, white colors. The commercial uses of Claystone are pottery and that of Nephelinite are creating artwork, soil conditioner, source of magnesia (mgo).