Thanks for your answer, but I think you are wrong. Some mesoamerican cultures used bronze for weapons and tools. There are some maceheads on display in the cusco museum, for example:
http://forum.axishistory.com/viewtop...f=57&p=1649011
As far as I have read, star-shaped maceheads are called "porra". Guaman Poma has depicted them in his chronicle in 1615:
