Know all about Siltstone and Breccia properties here. All properties of rocks are important as they define the type of rock and its application. Siltstone and Breccia belong to Sedimentary Rocks.Texture of Siltstone is Clastic whereas that of Breccia is Brecciated, Clastic. Siltstone appears Rough and Breccia appears Layered, Banded, Veined and Shiny. The luster of Siltstone is dull while that of Breccia is dull to pearly. Siltstone is available in brown, red, reddish brown 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 Siltstone are raw material for the manufacture of mortar, soil conditioner and that of Breccia are creating artwork, gemstone, jewelry.