MB ZERO+ Marble Polishing Powder was designed to amaze you with outstanding results! It is easy to use, less aggressive than most polishing powders, and produces superior clarity and shine, thus allowing you to polish to a high gloss. Zero+ is a specially formulated, extremely unique powder for all calcite-based stones that creates a tremendously high shine with Zero oxalic acid. The Zero+ is milled to a very fine talc consistency yet is more effective than traditional powders on sensitive or hard to polish stones such as white, black, brown marbles and serpentines.