Know all about Rhyolite and Siltstone properties here. All properties of rocks are important as they define the type of rock and its application. Rhyolite belongs to Igneous Rocks while Siltstone belongs to Sedimentary Rocks.Texture of Rhyolite is Aphanitic, Glassy, Porphyritic whereas that of Siltstone is Clastic. Rhyolite appears Banded and Siltstone appears Rough. The luster of Rhyolite is earthy while that of Siltstone is dull. Rhyolite is available in grey, white, light black colors whereas Siltstone is available in brown, red, reddish brown colors. The commercial uses of Rhyolite are gemstone, laboratory bench tops, jewelry and that of Siltstone are raw material for the manufacture of mortar, soil conditioner.