Know all about Gneiss and Chalk properties here. All properties of rocks are important as they define the type of rock and its application. Gneiss belongs to Metamorphic Rocks while Chalk belongs to Sedimentary Rocks.Texture of Gneiss is Banded, Foliated, Platy whereas that of Chalk is Clastic or Non-Clastic. Gneiss appears Foliated and Chalk appears Soft. The luster of Gneiss and Chalk is dull. Gneiss is available in black, brown, pink, red, white colors whereas Chalk is available in grey, white, yellow colors. The commercial uses of Gneiss are cemetery markers, jewelry, tombstones, used in aquariums 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.