Know all about Peridotite and Chalk properties here. All properties of rocks are important as they define the type of rock and its application. Peridotite belongs to Igneous Rocks while Chalk belongs to Sedimentary Rocks.Texture of Peridotite is Phaneritic whereas that of Chalk is Clastic or Non-Clastic. Peridotite appears Rough and Shiny and Chalk appears Soft. The luster of Peridotite is shiny while that of Chalk is dull. Peridotite is available in dark greenish - grey colors whereas Chalk is available in grey, white, yellow colors. The commercial uses of Peridotite are creating artwork, gemstone, jewelry, source of chromite, platinum, nickel and garnet, source of diamonds and that of Chalk are alumina refineries, creating artwork, drawing on blackboards, gymnasts, athletes and mountain climbers use for grip, in aquifers, paper industry, production of lime, raw material for manufacture of quicklime, slaked lime, soil conditioner, whiting, whiting material in toothpaste, paint and paper.