Know all about Argillite and Gabbro properties here. All properties of rocks are important as they define the type of rock and its application. Argillite belongs to Sedimentary Rocks while Gabbro belongs to Igneous Rocks.Texture of Argillite is Clastic, Polished whereas that of Gabbro is Phaneritic. Argillite appears Rough and Dull and Gabbro appears Veined and Shiny. The luster of Argillite is waxy and dull while that of Gabbro is not available. Argillite and Gabbro are available in dark grey to black, pink, red, white colors. The commercial uses of Argillite are fire resistant, used to manufracture paperweights and bookends and that of Gabbro are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones.