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