But the news here isn't "the Aztecs had obsidian mirrors they used for ritual purposes", it's "several obsidian mirrors found in Europe, one purportedly belongi

But the news here isn't "the Aztecs had obsidian mirrors they used for ritual purposes", it's "several obsidian mirrors found in Europe, one purportedly belonging to John Dee, have been authenticated as being of Aztec make by analyzing the chemical makeup of the material". It could have been a contemporary knockoff or later forgery; now there's a strong case for its authenticity.