Know all about Tuff and Alkali Feldspar Granite properties here. All properties of rocks are important as they define the type of rock and its application. Tuff and Alkali Feldspar Granite belong to Igneous Rocks.Texture of Tuff is Clastic, Pyroclastic whereas that of Alkali Feldspar Granite is Phaneritic. Tuff appears Dull, Vesicular and Foilated and Alkali Feldspar Granite appears Veined or Pebbled. The luster of Tuff is vitreous to dull while that of Alkali Feldspar Granite is dull to grainy with sporadic parts pearly and vitreous. Tuff is available in brown, grey, yellow colors whereas Alkali Feldspar Granite is available in black, grey, orange, pink, white colors. The commercial uses of Tuff are creating artwork and that of Alkali Feldspar Granite are curling, gemstone, laboratory bench tops, tombstones.