Know all about Tachylite and Dunite properties here. All properties of rocks are important as they define the type of rock and its application. Tachylite and Dunite belong to Igneous Rocks.Texture of Tachylite is Vitreous whereas that of Dunite is Phaneritic. Tachylite appears Glassy and Dunite appears Rough and Shiny. The luster of Tachylite is resinous while that of Dunite is shiny. Tachylite is available in black, dark brown colors whereas Dunite is available in dark greenish - grey colors. The commercial uses of Tachylite are cemetery markers, creating artwork and that of Dunite are creating artwork, gemstone, jewelry, source of chromite, platinum, nickel and garnet, source of diamonds.