Know all about Siltstone and Suevite properties here. All properties of rocks are important as they define the type of rock and its application. Siltstone belongs to Sedimentary Rocks while Suevite belongs to Metamorphic Rocks.Texture of Siltstone is Clastic whereas that of Suevite is Earthy. Siltstone appears Rough and Suevite appears Banded. The luster of Siltstone is dull while that of Suevite is earthy. Siltstone is available in brown, red, reddish brown colors whereas Suevite is available in black, brown, colourless, green, grey, pink colors. The commercial uses of Siltstone are raw material for the manufacture of mortar, soil conditioner and that of Suevite are as a feed additive for livestock, gemstone, metallurgical flux, source of magnesia (mgo).