Know all about Siltstone and Schist properties here. All properties of rocks are important as they define the type of rock and its application. Siltstone belongs to Sedimentary Rocks while Schist belongs to Metamorphic Rocks.Texture of Siltstone is Clastic whereas that of Schist is Foliated, Platy. Siltstone appears Rough and Schist appears Layered and Shiny. The luster of Siltstone is dull while that of Schist is shiny. Siltstone is available in brown, red, reddish brown colors whereas Schist is available in black, blue, brown, dark brown, green, grey, silver colors. The commercial uses of Siltstone are raw material for the manufacture of mortar, soil conditioner and that of Schist are used in aquariums, writing slates.