Know all about Alkali Feldspar Granite and Marl 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 Marl belongs to Sedimentary Rocks.Texture of Alkali Feldspar Granite is Phaneritic whereas that of Marl is Earthy. Alkali Feldspar Granite appears Veined or Pebbled and Marl appears Rough and Dull. The luster of Alkali Feldspar Granite is dull to grainy with sporadic parts pearly and vitreous while that of Marl is dull. Alkali Feldspar Granite is available in black, grey, orange, pink, white colors whereas Marl is available in beige, brown, green, grey, white colors. The commercial uses of Alkali Feldspar Granite are curling, gemstone, laboratory bench tops, tombstones and that of Marl are creating artwork, soil conditioner.