Know all about Chalk and Chert properties here. All properties of rocks are important as they define the type of rock and its application. Chalk and Chert belong to Sedimentary Rocks.Texture of Chalk is Clastic or Non-Clastic whereas that of Chert is Banded, Rough. Chalk appears Soft and Chert appears Glassy or Pearly. The luster of Chalk is dull while that of Chert is waxy and dull. Chalk is available in grey, white, yellow colors whereas Chert is available in black, brown, green, grey, red, white 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 Chert are creating artwork, gemstone, in fire-starting tools, jewelry, to ignite fire, used in flintlock firearms.