Know all about Chalk and Jasperoid properties here. All properties of rocks are important as they define the type of rock and its application. Chalk and Jasperoid belong to Sedimentary Rocks.Texture of Chalk is Clastic or Non-Clastic whereas that of Jasperoid is Earthy. Chalk appears Soft and Jasperoid appears Glassy or Pearly. The luster of Chalk is dull while that of Jasperoid is vitreous and pearly. Chalk is available in grey, white, yellow colors whereas Jasperoid is available in black, brown, colourless, green, grey, pink, 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 Jasperoid are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner, source of magnesia (mgo).