Facing brick made entirely with yellow-baking diluvial clay from the Meuse valley. The clay is cast in one throw, which accounts for the characteristic irregularities and ribs of the finished brick. The artificial ageing process gives the bricks an old look, i.e. broken or rounded-off corners and sides, eroded and weathered visible surfaces with yellow-rose, beige and some grey colour shades. Slight colour variations from one batch to another are possible.