— abrasion;
— fragility.
These characteristics play a certain role when choosing natural stone for finishing work. For example, a natural porous stone is used for floor cladding with an internal heating system, because it “breathes” perfectly. But, such a stone, to everything else, also absorbs any coloring liquids, which will ruin its appearance. Porous natural stone has excellent processing, while having a slight weight. Porous materials are poorly polished, have low elasticity and strength.