Know all about Scoria and Chalk properties here. All properties of rocks are important as they define the type of rock and its application. Scoria belongs to Igneous Rocks while Chalk belongs to Sedimentary Rocks.Texture of Scoria is Vesicular whereas that of Chalk is Clastic or Non-Clastic. Scoria appears Glassy and Vesicular and Chalk appears Soft. The luster of Scoria is subvitreous to dull while that of Chalk is dull. Scoria is available in black, brown, dark grey to black, red colors whereas Chalk is available in grey, white, yellow colors. The commercial uses of Scoria are as a traction material on snow-covered roads, creating artwork, high-temperature insulation, in gas barbecue grills 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.