Know all about Chalk and Sovite properties here. All properties of rocks are important as they define the type of rock and its application. Chalk belongs to Sedimentary Rocks while Sovite belongs to Igneous Rocks.Texture of Chalk is Clastic or Non-Clastic whereas that of Sovite is Granular, Poikiloblastic. Chalk appears Soft and Sovite appears Dull, Banded and Foilated. The luster of Chalk is dull while that of Sovite is subvitreous to dull. Chalk is available in grey, white, yellow colors whereas Sovite 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 Sovite are an oil and gas reservoir, as a feed additive for livestock, creating artwork, gemstone, metallurgical flux, production of lime, soil conditioner, source of magnesia (mgo).