Why Granite only and not Marble for Kitchen platforms?

 Marble is a porous, calcareous, metamorphic, foliated stone. Granite is non-porous, igneous, siliceous, unstratified stone. Relatively granite is much stronger than marble.

Since marble is porous, it can absorb acids, oils and alkalis used on kitchen platform. Marble being a calcareous stone reacts with even mild acids like hydrochloric acid. These can decolour or stain the marble permanently.Hence marble cleaning is difficult when stained. Also the smoothly polished marble can deteriorate over a period of time since it is a porous and a relatively soft stone. Marble can also get chipped easily compared to granite. Hence it is recommended to use granite only on kitchen platform.