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