Know all about Siltstone and Ganister properties here. All properties of rocks are important as they define the type of rock and its application. Siltstone and Ganister belong to Sedimentary Rocks.Texture of Siltstone is Clastic whereas that of Ganister is Clastic, Granular, Rough. Siltstone appears Rough and Ganister appears Rough. The luster of Siltstone and Ganister is dull. Siltstone is available in brown, red, reddish brown colors whereas Ganister is available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow colors. The commercial uses of Siltstone are raw material for the manufacture of mortar, soil conditioner and that of Ganister are an oil and gas reservoir, in aquifers, petroleum reservoirs, soil conditioner, source of magnesia (mgo), tombstones.