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