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