Marble and granite are porous materials and therefore, are subject to staining if not maintained properly. In granite, the same porosity that allows for staining also allows for easy stain removal. In most cases, stains can be prevented by quickly wiping the spill. If a spill is left overnight, especially if the liquid is grease, oil, coffee, or wine the granite will usually darken. To remove the stain, a poultice should be applied, which may pull out the stain from the granite. Marble can be stained and etched by acidic or oil-based products. If try to remove the stain yourself and are unsuccessful, please contact Carved Stone Creations for assistance.