Know all about Argillite and Troctolite properties here. All properties of rocks are important as they define the type of rock and its application. Argillite belongs to Sedimentary Rocks while Troctolite belongs to Igneous Rocks.Texture of Argillite is Clastic, Polished whereas that of Troctolite is Phaneritic. Argillite appears Rough and Dull and Troctolite appears Veined and Shiny. The luster of Argillite is waxy and dull while that of Troctolite is not available. Argillite and Troctolite 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 Troctolite are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones.