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American Focus > Blog > Tech and Science > Unprecedented Survey of Aztec Obsidian Reveals Coast-to-Coast Trade Network : ScienceAlert
Tech and Science

Unprecedented Survey of Aztec Obsidian Reveals Coast-to-Coast Trade Network : ScienceAlert

Last updated: May 12, 2025 10:20 pm
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Unprecedented Survey of Aztec Obsidian Reveals Coast-to-Coast Trade Network : ScienceAlert
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The Aztec Empire’s Extensive Obsidian Trade Network

The Aztec Empire was once home to a vast trade network that brought volcanic glass to its capital, Tenochtitlan, from various regions across Mesoamerica. A recent study of obsidian artifacts found in Tenochtitlan sheds light on the far-reaching influence of the Mexica culture, the dominant faction of the Aztec Alliance.

The study, which analyzed 788 precious obsidian objects including weapons, urns, jewelry, and decorated human skulls, revealed that these artifacts were sourced from different locations across the Trans-Mexican Volcanic Belt, including territories controlled by rival governments.

This discovery underscores the commercial sophistication of the Aztec Empire during its peak. Obsidian, a volcanic glass used extensively by the Aztecs, is harder than steel, sharp enough to rival a razor blade, and comes in a variety of colors.

Researchers working on the study, in collaboration with Mexico’s Templo Mayor Project and the National Institute of Anthropology and History, mapped out a timeline and geographical distribution of the obsidian objects found in Tenochtitlan.

The majority of the obsidian artifacts originated from Sierra de Pachuca, located northeast of Tenochtitlan, known for its green and golden volcanic glass. However, a portion of the artifacts came from seven different locations, some situated beyond the Aztec Empire’s political boundaries.

Before the formation of the Aztec Alliance, obsidian in Tenochtitlan primarily came from nearby Pachuca. After the consolidation of the Empire, obsidian from distant regions, such as Ucareo, located northwest of Tenochtitlan and controlled by the Purépecha Empire, also made its way to the capital.

The presence of multiple sources of obsidian indicates the expansion of commercial interactions by the Mexica culture. Everyday items made from obsidian were likely sold in Tenochtitlan’s bustling market, where merchants from different regions gathered to trade their goods.

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On the other hand, ritual objects made of obsidian, particularly those with sacred significance, were predominantly sourced from Sierra de Pachuca due to its unique green colors. This preference for local obsidian for sacred objects highlights the cultural significance attached to specific types of volcanic glass.

By studying the origins of Aztec obsidian artifacts, researchers aim to gain insights into the movement of goods across Mesoamerica and unravel the intricate trade networks of the ancient Aztec Empire.

The comprehensive study, published in PNAS, showcases the meticulous analysis of obsidian artifacts and provides valuable insights into the economic and cultural dynamics of the Aztec Empire.

TAGGED:AzteccoasttocoastNetworkObsidianRevealsScienceAlertSurveyTradeUnprecedented
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