PRETO is a natural stone ideal for those seeking classic wall coverings in versatile colors. Grey walls never go out of style — they only gain elegance over time, and natural stone helps achieve that. PRETO captivates with its depth of color, the delicate imperfections typical of natural stone, and a subtle sheen. A keen eye will notice that PRETO combines a variety of grey tones that flow into one another across the surface of each tile. Upon closer look, you may also notice a few gentle reddish hues.