Similar in crystalline structure to tin and gold, aluminum is very easy to form even when cold. Its softness in combination with its low melting temperature (aluminum: 660 degrees Celcius; silver: 961; iron: 1,535) allows it to be quickly formed into a multitude of shapes and thicknesses. Malleability and affordability make aluminum an attractive material for artisans, eliminating complicated tooling procedures or multiple heating passes.