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