Marble kitchen counter tops Colorado Springs, CO? Let’s get more specific about comparing marble and granite countertops. These are natural stone materials, and both are porous. If you want the technical details, marble is a metamorphic rock formed from recrystallized carbon. It is formed out of limestone that is subjected to intense pressure and heat due to tectonic shifting in the earth’s crust. Vanquish stubborn stains. If you can’t remove a stain by yourself, it may be time to call a stone refinisher. “They’ll do a professional cleaning using special grinders, and perhaps fine-grit sandpaper,” says Bruno. But Bruno doesn’t …