Know all about Argillite and Novaculite properties here. All properties of rocks are important as they define the type of rock and its application. Argillite and Novaculite belong to Sedimentary Rocks.Texture of Argillite is Clastic, Polished whereas that of Novaculite is Banded, Glassy, Rough, Vitreous. Argillite appears Rough and Dull and Novaculite appears Glassy or Pearly. The luster of Argillite and Novaculite is waxy and dull. Argillite is available in dark grey to black, pink, red, white colors whereas Novaculite is available in black, brown, green, grey, red, white colors. The commercial uses of Argillite are fire resistant, used to manufracture paperweights and bookends and that of Novaculite are cemetery markers, gemstone, in aquifers, in fire-starting tools, jewelry, manufacture of tools, pebbles are used in ball mills to grind in ceramics industry, to determine the gold content of jewelry.