Metal is a dual element. It is well represented by Chinese coins, which are round and have a square in the middle. Metal buildings are either round; or in the shape of a dome; or with curved walls; or square, like modern boxes. These buildings are money-bringers; this is the ideal shape for a bank. Homes with a high ceiling and a lot of glass are also metal. Metal reflects and needs space.
The metal colours are white and all of the metallic tones: gold, silver, copper, brass or chrome tones. Its corresponding direction is West, and it symbolizes the lungs.