brick is not a natural rock, what type of rock is it ?
what are Pulhamite and Coade Stone examples of ?

помогите решить это задание . Ответить надо на английском. Заранее спасибо

Bricks are used for buildings and pavements all over the world. They are laid flat and are usually bonded to get a good stability and strength. Pulhamite stone is an artificial sandstone; which was invented by James Pulham. Examples are bedding-planes; pebble-bads; shale-layers and rock-jointings. Coade Stone is an artificial stone used in the late 18th and early 19th centuries. It was used for moulding Neoclassical statues, architectural decorations and garden ornaments. It`s still waterproof today and seen on St George`s Chapel; Windsor; The Royal Pavillon and Buckingham Palace in London.