Cardoso stone is dark grey verging on blue: it's a low-metamorphic grade sandstone rock, formed by the fragmentation of grani tic rocks. A resistant ceramic surface that is also available in warmer shades, offering great potential for use in both architecture and urban furnishings. Pale striped grains move lightly across the surface, which is soft to the touch yet highly resistant. For both indoor and outdoor use. Simple, elegant and with a strong character: these are the distinctive features of a material suited to any environment.