Know all about Siltstone and Hyaloclastite properties here. All properties of rocks are important as they define the type of rock and its application. Siltstone belongs to Sedimentary Rocks while Hyaloclastite belongs to Igneous Rocks.Texture of Siltstone is Clastic whereas that of Hyaloclastite is Pyroclastic. Siltstone appears Rough and Hyaloclastite appears Dull. The luster of Siltstone is dull while that of Hyaloclastite is dull and grainy. Siltstone is available in brown, red, reddish brown colors whereas Hyaloclastite is available in brown, grey, yellow colors. The commercial uses of Siltstone are raw material for the manufacture of mortar, soil conditioner and that of Hyaloclastite are cemetery markers, creating artwork.