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