Dark-colored metamorphic rock consisting of greyish white patches. The texture is characterised by planes of close schistosity with millimetric spacing linked to planar anisotropy of the phyllosilicate constituents. The rock is visibly heterogeneous and on the polished surface shows a cloudy and porous appearance in places, depending on the different hardness of the constituents.
It comes in small-sized blocks, has very high technical-mechanical features and virtually zero water absorption. It is a particularly exclusive and modern material that is completely frost-proof, and suitable for both indoor and outdoor use.