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