Maintenance and Protection
Natural stone can be scratched by any material harder than itself. This includes stone harder than what is installed, metals or sand particles. Natural stone will absorb water and humidity in the air. It should be protected from acids in food, as well as alcohol or oils, as these will leave stain on the surface. After exposure to any material that causes staining, the surface should be treated with special cleanser immediately.
Polished stones and stones with darker natural color will fade if they are used in heavy foot traffic areas or subjected to sunlight for a long period.