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