Know all about Gritstone and Alkali Feldspar Granite properties here. All properties of rocks are important as they define the type of rock and its application. Gritstone belongs to Sedimentary Rocks while Alkali Feldspar Granite belongs to Igneous Rocks.Texture of Gritstone is Earthy whereas that of Alkali Feldspar Granite is Phaneritic. Gritstone appears Layered and Foliated and Alkali Feldspar Granite appears Veined or Pebbled. The luster of Gritstone is dull while that of Alkali Feldspar Granite is dull to grainy with sporadic parts pearly and vitreous. Gritstone is available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow colors whereas Alkali Feldspar Granite is available in black, grey, orange, pink, white colors. The commercial uses of Gritstone are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner, source of magnesia (mgo), tombstones and that of Alkali Feldspar Granite are curling, gemstone, laboratory bench tops, tombstones.