Know all about Chalk and Pyroxenite properties here. All properties of rocks are important as they define the type of rock and its application. Chalk belongs to Sedimentary Rocks while Pyroxenite belongs to Igneous Rocks.Texture of Chalk is Clastic or Non-Clastic whereas that of Pyroxenite is Clastic, Granular, Phaneritic, Porphyritic. Chalk appears Soft and Pyroxenite appears Layered, Banded, Veined and Shiny. The luster of Chalk is dull while that of Pyroxenite is dull to vitreous to submetallic. Chalk is available in grey, white, yellow colors whereas Pyroxenite is available in black to grey, bluish - grey, dark greenish - grey, green, light greenish grey colors. The commercial uses 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 and that of Pyroxenite are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones.