Know all about Argillite and Gossan properties here. All properties of rocks are important as they define the type of rock and its application. Argillite belongs to Sedimentary Rocks while Gossan belongs to Metamorphic Rocks.Texture of Argillite is Clastic, Polished whereas that of Gossan is Rough, Sandy. Argillite appears Rough and Dull and Gossan appears Dull and Banded. The luster of Argillite is waxy and dull while that of Gossan is metallic. Argillite is available in dark grey to black, pink, red, white colors whereas Gossan is available in brown, brown- black, gold, green, rust colors. The commercial uses of Argillite are fire resistant, used to manufracture paperweights and bookends and that of Gossan are cemetery markers, commemorative tablets, gemstone.