Natural stone bears natures many complexities and shows large variations in its absorption,
density and hardness. These have an important impact on how to protect and preserve the appearance and beauty of the stone.Also, due to its absorbent nature, some varieties more so than others, will absorb liquids and oils, causing stains, discolorations or irreversible mineralogical chemical changes in the stone. These processes are greatly minimized by having the stone treated with a penetrating water or oil repellent.