Know all about Chalk and Granophyre properties here. All properties of rocks are important as they define the type of rock and its application. Chalk belongs to Sedimentary Rocks while Granophyre belongs to Igneous Rocks.Texture of Chalk is Clastic or Non-Clastic whereas that of Granophyre is Granophyric. Chalk appears Soft and Granophyre appears Veined or Pebbled. The luster of Chalk is dull while that of Granophyre is dull to grainy with sporadic parts pearly and vitreous. Chalk is available in grey, white, yellow colors whereas Granophyre is available in black, grey, orange, 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 Granophyre are curling, gemstone, laboratory bench tops, tombstones.