Smithsonian Skull

The Smithsonian Skull, which is Catalogue No. A562841-0 in the collections of the Department of Anthropology, National Museum of Natural History, was mailed to the Smithsonian Institution anonymously in 1992, and was claimed to be an Aztec object by its donor and was purportedly from the collection of Porfirio Diaz.

  It is the largest of the crystal skulls, weighing 31 pounds (14 kg) and is 15 inches (38 cm) high. It was carved using carborundum, a modern abrasive. It has been displayed as a fake at the National Museum of Natural History.