A balanced blend of selected powders to polish all geological and commercial granites as well as many marbles. Its polishing action is so powerful that most granite can be effectively polished right after 400 grit! MB-16 is an amazing performer that polishes to a deep gloss all mercantile granites right after a 400 grit honing cut. Also works great on marbles that are too sensitive (or insensitive) to acid-based polishing powders.