While it’s possible copper crossed the Atlantic, more is known about the use and (overland, riverine) trade of copper in precolumbian America. In the Mediterranean, the copper of Cyprus shipped as “oxhide” ingots (easier to handle and carry) was mined and traded for a long, long time, and those ingots show up on wrecks and in the ruins of ancient cities.
Romans in Brazil During the Second or Third Century?
http://www.freerepublic.com/focus/bloggers/1248340/posts
Wow, even the Romans had heard about Rio Carnival?