There are perhaps a dozen rare crystal skulls that have fueled intense interest and controversy among archaeologists, scientists, spiritualists, and museum officials for more than a century. Many believe these skulls were carved tens of thousands of years ago by an ancient Mesoamerican civilization because of the prominent use of skulls in ancient artwork, particularly among the Aztec. Several Aztec gods were represented by skulls, so crystal skulls likely invoked these gods as a symbol of regeneration. However, recent electron microscope analyses of skulls by the British Museum and the Smithsonian Institution revealed markings that could only have been made with modern carving implements. Both museums estimate that their skulls date to sometime in the mid to late 1800s, a time when public interest in ancient cultures was high and museums were eager for pieces to display.
There is passion on both sides, and the fact remains that no one knows for sure who made these skulls and when, and since there is currently no way to accurately determine the age of such inorganic objects, the mystery will likely continue.