Know all about Tuff and Picrite properties here. All properties of rocks are important as they define the type of rock and its application. Tuff and Picrite belong to Igneous Rocks.Texture of Tuff is Clastic, Pyroclastic whereas that of Picrite is Earthy, Rough. Tuff appears Dull, Vesicular and Foilated and Picrite appears Rough and Shiny. The luster of Tuff is vitreous to dull while that of Picrite is subvitreous to dull. Tuff is available in brown, grey, yellow colors whereas Picrite is available in black, brown, colourless, green, grey, pink, white, yellow colors. The commercial uses of Tuff are creating artwork and that of Picrite are as a feed additive for livestock, as armour rock for sea walls, metallurgical flux, pottery, source of magnesia (mgo).