Aztec duck-head pendants recovered from Tenochtitlán were made using volcanic glass called obsidian. - Mirsa Islas/Courtesy Proyecto Templo Mayor, INAH Hundreds of obsidian artifacts have revealed ...

Aztec duck-head pendants recovered from Tenochtitlán were made using volcanic glass called obsidian. - Mirsa Islas/Courtesy Proyecto Templo Mayor, INAH ...

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