Block material is a term used to describe the various materials used to construct walls, buildings, and other structures. MAPLE is a hardwood tree commonly used for building furniture and other items. STONE is a natural material that has been used for centuries to build structures such as castles and monuments. BRICK is a man-made material made from clay and shale that is often used in construction. ADOBE is a type of BRICK made from sun-dried mud and straw that is popular in many parts of the world.