Although it’s not obvious to the naked eye, rocks do absorb water. 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. “It’s a hard surface! How can a natural stone countertop absorb water?” she wondered.
Granite vanity by LDa Architecture & Interiors; photo via Houzz