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