Know all about Tachylite and Granulite properties here. All properties of rocks are important as they define the type of rock and its application. Tachylite belongs to Igneous Rocks while Granulite belongs to Metamorphic Rocks.Texture of Tachylite is Vitreous whereas that of Granulite is Granoblastic. Tachylite appears Glassy and Granulite appears Veined or Pebbled. The luster of Tachylite is resinous while that of Granulite is vitreous. Tachylite is available in black, dark brown colors whereas Granulite is available in black, brown colors. The commercial uses of Tachylite are cemetery markers, creating artwork and that of Granulite are curling, gemstone, laboratory bench tops, soil conditioner, tombstones.