Know all about Ignimbrite and Siltstone properties here. All properties of rocks are important as they define the type of rock and its application. Ignimbrite belongs to Igneous Rocks while Siltstone belongs to Sedimentary Rocks.Texture of Ignimbrite is Aphanitic whereas that of Siltstone is Clastic. Ignimbrite appears Dull, Vesicular and Foilated and Siltstone appears Rough. The luster of Ignimbrite is vitreous to dull while that of Siltstone is dull. Ignimbrite is available in beige, black, brown, grey, pink, white colors whereas Siltstone is available in brown, red, reddish brown colors. The commercial uses of Ignimbrite are cemetery markers, commemorative tablets, creating artwork and that of Siltstone are raw material for the manufacture of mortar, soil conditioner.