Obsidian 'spirit mirror' used by Elizabeth I's adviser has Aztec origins

Researcher Elizabeth Healey holds John Dee's obsidian mirror.

(CNN)An obsidian "spirit mirror" used by a confidant of Queen Elizabeth I is actually a product of the Aztec culture, according to new research. An analysis of the obsidian mirror, made from volcanic glass, and three other similar objects at the British Museum revealed their Mexican origins.

The obsidian mirror with the Elizabeth I connection belonged to John Dee, an adviser of hers from when she became queen in 1558 and through the 1570s. Dee served as the queen's astrologer and also consulted with her on science. This included Dee acting "as an advocate of voyages of discovery, establishing colonies and improving navigation," said Stuart Campbell, study author and professor at the University of Manchester.
"John Dee is a remarkable historical figure, a Renaissance polymath -- interested in astronomy, alchemy and mathematics -- and confidant of Elizabeth I," Campbell wrote in an email. "Later he became involved in divination and the occult, seeking to talk to angels through the use of scryers (those who divine the future), who used artifacts -- like mirrors and crystals."
    The obsidian mirror used by John Dee was created by the Aztecs.
    While it had been previously suspected that the mirror had been made by the Aztec culture, there were no records accompanying the object to show how it came into Dee's possession.
      A team of researchers used geochemical analysis to target the four obsidian objects with X-rays. This in turn caused the objects to emit X-rays, helping the scientists determine their composition by revealing the elements of the obsidian. In addition to Dee's mirror, they studied two other Aztec mirrors and a rectangular slab of obsidian.
        The analysis showed that all four were made using Mexican obsidian. Dee's mirror and a similarly designed mirror were made using obsidian from Pachuca, a city that is a source of obsidian the Aztecs used. The third mirror and the slab are made of obsidian from the town of Ucareo, another obsidian site in Mexico.
        A study on the findings published Wednesday in the journal Antiquity.
          The researchers estimate that Dee's mirror is about 500 years old, most likely made in the final decades before the Spanish conquest of Mexico in 1521, Campbell said.
          "We know that Spanish conquistador Hernán Cortés sometimes commissioned items from Aztec craftsmen so he could send them back to the Spanish court," Campbell said. "So it is even possible that some of the circular mirrors like John Dee's were specially made by Aztec craftsmen at the time of the conquest of the Aztec Empire to send back to Europe."
          This figure shows Tezcatlipoca, lord of the smoking mirror, with circular obsidian mirrors on his temple, his chest and his foot highlighted.
          While researchers haven't been able to pinpoint the obsidian mirrors' intended use in Aztec culture, depictions remain that show circular obsidian mirrors made at this time.
          "They're shown particularly in drawings of the god Tezcatlipoca, in place of a missing foot, or attached to his chest or head," Campbell said. "The mirrors that have survived may well have actually been attached to statues of the god. Tezcatlipoca was the god of divination and providence, amongst several other things, and the obsidian mirrors were probably much more than simply symbols of power -- they also seem likely to have been used for divinatory purposes."
          Tezcatlipoca's name also means "smoking mirror."
          The Aztecs believed that obsidian had spiritual significance, and it was used in their medicinal practices, as well as a way to ward off bad spirits or even capture souls by using the reflective nature of the volcanic glass.
          Items of such significance to the Aztecs would have been intriguing to the Europeans exploring Mexico.
          These are Aztec depictions of the mirrors.
          "The 16th century was a period in which new exotic objects were being brought to Europe from the New World, and opening up exciting new possibilities in the intellectual world of the period," Campbell said.
          Dee, the first person known to use the term "British Empire," would have been fascinated by the idea of the mirrors if he heard stories of how the Aztecs used them, Campbell said. Dee had an interest in the occult early on, and once he obtained the obsidian mirror, he used it to try communicating with spirits, according to the study.