Know all about Siltstone and Pumice properties here. All properties of rocks are important as they define the type of rock and its application. Siltstone belongs to Sedimentary Rocks while Pumice belongs to Igneous Rocks.Texture of Siltstone is Clastic whereas that of Pumice is Vesicular. Siltstone appears Rough and Pumice appears Vesicular. The luster of Siltstone is dull while that of Pumice is earthy. Siltstone is available in brown, red, reddish brown colors whereas Pumice is available in beige, colourless, grey, light green, light grey, pink, white, yellow- grey colors. The commercial uses of Siltstone are raw material for the manufacture of mortar, soil conditioner and that of Pumice are as a traction material on snow-covered roads, as an abrasive in pencil erasers, fine abrasive used for polishing, manufacture of soap, solvents, dyes, plastics and fibres, used in aquariums.