Westminster Bridge in the context of "Cast stone"

Cast stone or reconstructed stone is a refined artificial stone, a form of precast concrete. It is used as a building material to simulate natural-cut masonry in architectural features such as facings and trim; for statuary; and for garden ornaments. It may replace natural building stones including limestone, brownstone, sandstone, bluestone, granite, slate, and travertine. Cast stone can be made from white or grey cements, manufactured or natural sands, crushed stone or natural gravels, and can be coloured with mineral colouring pigments. It is cheaper and more uniform than natural stone, and allows transporting the bulk materials and casting near the place of use, which is cheaper than transporting and carving very large pieces of stone.