Know all about Chalk and Rhyolite properties here. All properties of rocks are important as they define the type of rock and its application. Chalk belongs to Sedimentary Rocks while Rhyolite belongs to Igneous Rocks.Texture of Chalk is Clastic or Non-Clastic whereas that of Rhyolite is Aphanitic, Glassy, Porphyritic. Chalk appears Soft and Rhyolite appears Banded. The luster of Chalk is dull while that of Rhyolite is earthy. Chalk is available in grey, white, yellow colors whereas Rhyolite is available in grey, white, light black 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 Rhyolite are gemstone, laboratory bench tops, jewelry.