Are granite worktops porous?

Granite worktops are made from a natural stone, so they are porous to some degree. However, they are sealed during the manufacturing process to help protect them from staining and other damage. Over time, the sealant may wear away and need to be reapplied. Granite is also a relatively hard and durable material, so it is not as susceptible to scratching and other damage as some other materials.