ABSTRACT
About four thousand years ago (2000BCE), in many instances it was becoming impractical to barter. Using stones as currency for common everyday exchanges also became impractical. Although there were a number of possibilities, metal became the obvious choice but it too had to possess certain qualities that allowed it to be easily manufactured, and identified while providing the necessary durability and portability required. It was at this point that bronze was selected as the material of choice for currency.
