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