Know all about Siltstone and Kimberlite properties here. All properties of rocks are important as they define the type of rock and its application. Siltstone belongs to Sedimentary Rocks while Kimberlite belongs to Igneous Rocks.Texture of Siltstone is Clastic whereas that of Kimberlite is Porphyritic. Siltstone appears Rough and Kimberlite appears Dull and Banded. The luster of Siltstone is dull while that of Kimberlite is subvitreous to dull. Siltstone is available in brown, red, reddish brown colors whereas Kimberlite is available in black, bluish - grey, brown, dark greenish - grey, green, grey colors. The commercial uses of Siltstone are raw material for the manufacture of mortar, soil conditioner and that of Kimberlite are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner, source of magnesia (mgo).