Know all about Alkali Feldspar Granite and Argillite properties here. All properties of rocks are important as they define the type of rock and its application. Alkali Feldspar Granite belongs to Igneous Rocks while Argillite belongs to Sedimentary Rocks.Texture of Alkali Feldspar Granite is Phaneritic whereas that of Argillite is Clastic, Polished. Alkali Feldspar Granite appears Veined or Pebbled and Argillite appears Rough and Dull. The luster of Alkali Feldspar Granite is dull to grainy with sporadic parts pearly and vitreous while that of Argillite is waxy and dull. Alkali Feldspar Granite is available in black, grey, orange, pink, white colors whereas Argillite is available in dark grey to black, pink, red, white colors. The commercial uses of Alkali Feldspar Granite are curling, gemstone, laboratory bench tops, tombstones and that of Argillite are fire resistant, used to manufracture paperweights and bookends.