Fired bricks are one of the longest-lasting and strongest building materials, sometimes referred to as artificial stone, and have been used since circa 5000 BC. The fired color of clay bricks is significantly influenced by the chemical and mineral content of raw materials, the firing temperature and the atmosphere in the kiln.
Natural, renewable, and reusable bricks do not contain any ozone-depleting substances and are actually composed of the four most readily available elements found in nature: Oxygen, alumina, iron, and silica. They can also contain recycled content that can add to the aesthetic appeal by coloring without compromising durability. Because brick does not typically need to be painted and does not promote mold growth, it additionally lends itself to great indoor air quality.