Know all about Scoria and Argillite properties here. All properties of rocks are important as they define the type of rock and its application. Scoria belongs to Igneous Rocks while Argillite belongs to Sedimentary Rocks.Texture of Scoria is Vesicular whereas that of Argillite is Clastic, Polished. Scoria appears Glassy and Vesicular and Argillite appears Rough and Dull. The luster of Scoria is subvitreous to dull while that of Argillite is waxy and dull. Scoria is available in black, brown, dark grey to black, red colors whereas Argillite is available in dark grey to black, pink, red, white 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 Argillite are fire resistant, used to manufracture paperweights and bookends.