Sky silver stone is one kind marble stones with dark background. Mine of this is located in semnan province. This stone with dingy background and white and silver streak, is reminder night sky with gray clouds. Sky silver marble stone in slab dimensions with 2 cm thickness is processed in the form of polished and leather. Like other marble stones, sky silver is used in internal places of buildings. Sky silver stone with dark background, gives special attractive and warmth to the internal places of building. The most usage of it is in margine floor stone of luxury residential and commercial buildings, Wc ,lobbies cobble, stair, staircasen, frame of elevator and stone artefacts.