“Although the Mexicas preferred green obsidian ... and luster also enabled the Mexica people to turn obsidian into highly polished ornaments and religious objects. The artifacts examined ...

Obsidian, meanwhile, cleaves into a fine and continuous edge when properly cut. Green said he once helped documentary makers produce a program on surgical technology in ancient Egyptian ...

Archaeologists found that while the Mexica primarily used green obsidian from the Sierra de Pachuca source, they also acquired obsidian from at least seven other locations, including regions ...