Know all about Argillite and Breccia properties here. All properties of rocks are important as they define the type of rock and its application. Argillite and Breccia belong to Sedimentary Rocks.Texture of Argillite is Clastic, Polished whereas that of Breccia is Brecciated, Clastic. Argillite appears Rough and Dull and Breccia appears Layered, Banded, Veined and Shiny. The luster of Argillite is waxy and dull while that of Breccia is dull to pearly. Argillite is available in dark grey to black, pink, red, white colors whereas Breccia is available in beige, black, blue, brown, buff, green, grey, orange, pink, purple, red, rust, white, yellow colors. The commercial uses of Argillite are fire resistant, used to manufracture paperweights and bookends and that of Breccia are creating artwork, gemstone, jewelry.