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