Know all about Argillite and Scoria properties here. All properties of rocks are important as they define the type of rock and its application. Argillite belongs to Sedimentary Rocks while Scoria belongs to Igneous Rocks.Texture of Argillite is Clastic, Polished whereas that of Scoria is Vesicular. Argillite appears Rough and Dull and Scoria appears Glassy and Vesicular. The luster of Argillite is waxy and dull while that of Scoria is subvitreous to dull. Argillite is available in dark grey to black, pink, red, white colors whereas Scoria is available in black, brown, dark grey to black, red colors. The commercial uses of Argillite are fire resistant, used to manufracture paperweights and bookends and that of Scoria are as a traction material on snow-covered roads, creating artwork, high-temperature insulation, in gas barbecue grills.