Several households made obsidian blades, and a few excavations uncovered evidence of the production of lip plugs, earplugs and other obsidian jewelry. (scientificamerican.com)
We recovered thousands of broken obsidian blades, whose closest geological source was 100 kilometers away. (scientificamerican.com)
Inside the Footprint Cave, our guide points out Maya pots that once held offerings of corn and chili peppers and lets us hold obsidian blades used for bloodletting ceremonies. (scubadiving.com)