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