Know all about Chalk and Phyllite properties here. All properties of rocks are important as they define the type of rock and its application. Chalk belongs to Sedimentary Rocks while Phyllite belongs to Metamorphic Rocks.Texture of Chalk is Clastic or Non-Clastic whereas that of Phyllite is Phyllitic Sheen, Slaty. Chalk appears Soft and Phyllite appears Crinkled or Wavy. The luster of Chalk is dull while that of Phyllite is phyllitic. Chalk is available in grey, white, yellow colors whereas Phyllite is available in black to grey, 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 Phyllite are cemetery markers, commemorative tablets, creating artwork, writing slates.