Know all about Greenschist and Chalk properties here. All properties of rocks are important as they define the type of rock and its application. Greenschist belongs to Metamorphic Rocks while Chalk belongs to Sedimentary Rocks.Texture of Greenschist is Foliated, Platy whereas that of Chalk is Clastic or Non-Clastic. Greenschist appears Layered and Shiny and Chalk appears Soft. The luster of Greenschist is shiny while that of Chalk is dull. Greenschist is available in dark greenish - grey, green colors whereas Chalk is available in grey, white, yellow colors. The commercial uses of Greenschist are blackboards, manufacture of tools, writing slates 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.