Know all about Lamprophyre and Siltstone properties here. All properties of rocks are important as they define the type of rock and its application. Lamprophyre belongs to Igneous Rocks while Siltstone belongs to Sedimentary Rocks.Texture of Lamprophyre is Porphyritic whereas that of Siltstone is Clastic. Lamprophyre appears Dull, Banded and Foilated and Siltstone appears Rough. The luster of Lamprophyre is subvitreous to dull while that of Siltstone is dull. Lamprophyre 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 Lamprophyre are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner, source of magnesia (mgo) and that of Siltstone are raw material for the manufacture of mortar, soil conditioner.