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