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