Got the Mayan or Olmec piece in a private lawn with permission. It rang up as silver. Do not know for sure
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Nice to know they visited north Alabama.
They even left a few coins. Thanks for looking.
I went through the mexican major native cultures. Toltec, Olmec, zapatec, Mayan, Inca statues, but only Mayan had a big head piece similar in perporsion. The jury is out, but someone may know. Best,