Know all about Pegmatite and Siltstone properties here. All properties of rocks are important as they define the type of rock and its application. Pegmatite belongs to Igneous Rocks while Siltstone belongs to Sedimentary Rocks.Texture of Pegmatite is Pegmatitic whereas that of Siltstone is Clastic. Pegmatite appears Layered, Banded, Veined and Shiny and Siltstone appears Rough. The luster of Pegmatite is grainy, pearly and vitreous while that of Siltstone is dull. Pegmatite is available in black, brown, cream, green, grey, pink, red, rust, silver, white, yellow colors whereas Siltstone is available in brown, red, reddish brown colors. The commercial uses of Pegmatite are creating artwork, jewelry, source of corundum, tourmalines, beryls and topaz and that of Siltstone are raw material for the manufacture of mortar, soil conditioner.