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