Know all about Siltstone and Mugearite properties here. All properties of rocks are important as they define the type of rock and its application. Siltstone belongs to Sedimentary Rocks while Mugearite belongs to Igneous Rocks.Texture of Siltstone is Clastic whereas that of Mugearite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Siltstone appears Rough and Mugearite appears Dull and Soft. The luster of Siltstone is dull while that of Mugearite is not available. Siltstone is available in brown, red, reddish brown colors whereas Mugearite is available in black, brown, light to dark grey colors. The commercial uses of Siltstone are raw material for the manufacture of mortar, soil conditioner and that of Mugearite are creating artwork.