Know all about Siltstone and Boninite properties here. All properties of rocks are important as they define the type of rock and its application. Siltstone belongs to Sedimentary Rocks while Boninite belongs to Igneous Rocks.Texture of Siltstone is Clastic whereas that of Boninite is Aphanitic to Porphyritic. Siltstone appears Rough and Boninite appears Dull and Soft. The luster of Siltstone is dull while that of Boninite is vitreous. Siltstone is available in brown, red, reddish brown colors whereas Boninite is available in bluish - grey, brown, colourless, green, grey colors. The commercial uses of Siltstone are raw material for the manufacture of mortar, soil conditioner and that of Boninite are an oil and gas reservoir, cemetery markers, creating artwork, soil conditioner, source of magnesia (mgo).