What is the Aztec sacrificial knife made of?

The Aztec sacrificial knife, known as a "teocalli," was typically made from obsidian, a volcanic glass that can be sharpened to a razor-like edge. Obsidian was favored for its sharpness and effectiveness in ritual sacrifices. Some knives also featured handles made from wood or bone, intricately carved and decorated, showcasing the Aztecs' craftsmanship and artistry.