Know all about Peridotite and Argillite properties here. All properties of rocks are important as they define the type of rock and its application. Peridotite belongs to Igneous Rocks while Argillite belongs to Sedimentary Rocks.Texture of Peridotite is Phaneritic whereas that of Argillite is Clastic, Polished. Peridotite appears Rough and Shiny and Argillite appears Rough and Dull. The luster of Peridotite is shiny while that of Argillite is waxy and dull. Peridotite is available in dark greenish - grey colors whereas Argillite is available in dark grey to black, pink, red, white colors. The commercial uses of Peridotite are creating artwork, gemstone, jewelry, source of chromite, platinum, nickel and garnet, source of diamonds and that of Argillite are fire resistant, used to manufracture paperweights and bookends.