Know all about Chalk and Essexite properties here. All properties of rocks are important as they define the type of rock and its application. Chalk belongs to Sedimentary Rocks while Essexite belongs to Igneous Rocks.Texture of Chalk is Clastic or Non-Clastic whereas that of Essexite is Granular. Chalk appears Soft and Essexite appears Banded. The luster of Chalk is dull while that of Essexite is not available. Chalk is available in grey, white, yellow colors whereas Essexite is available in dark grey to 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 Essexite are cemetery markers, commemorative tablets, jewelry, sea defence, tombstones.