Marble bath vanity by LDa Architecture & Interiors photo via Houzz And highly acidic substances like orange juice, coffee, and wine will also etch some marble and granite leaving a dull mark (especially on lighter colored stones.) For example, a puddle of water left on the counter for a lengthy period of time may show a dark spot when the water is wiped away. But prolonged contact with moisture can affect both surfaces. For example, denser igneous stones like granite absorb less liquid than their metamorphic counterpart, marble. The amount of absorbency varies depending on the exact type of stone. These channels act like a sponge, drawing liquids in over time. Natural stones hold a network of tiny interconnected channels (sort of like the body’s capillaries), which permit penetration by liquids and gasses. Granite vanity by LDa Architecture & Interiors photo via HouzzĪs natural stones, marble and granite countertops have varying degrees of porosity, which means that yes…they will indeed absorb water. “It’s a hard surface! How can a natural stone countertop absorb water?” she wondered. This came as a pretty big surprise to a recent customer who couldn’t figure out why a salesperson would try talking her into “non-porous” quartz surfacing for her busy family bathroom. Although it’s not obvious to the naked eye, rocks do absorb water.
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