But marble is not just about looks. It’s also a natural stone, and that means it has real strengths and real needs. Marble is softer and more porous than some other stones, like granite or quartzite. “Porous” means it can absorb liquids if it is not properly protected. Common spills—like coffee, wine, juice, cooking oil, and even water left under a bottle—can soak in and leave dark spots or stains.