Obsidian – a type of volcanic glass – can produce cutting ... knapper and archaeologist Errett Callahan, concedes that the Stone Age scalpels are not for everyone. “If it was let loose ...

A new analysis of hundreds of obsidian artifacts from the Aztec Empire has revealed the vast trade networks that supplied obsidian, sometimes even from rivals.

The stones used were typically flint or, in latter times, obsidian—a type of volcanic glass. Obsidian, even in modern times, is considered a difficult material to work with because it is so ...

Obsidian is among the most prized tool stones in the world, and this particular deposit, nearly 100 feet thick, is exceptional because of its continuous use by Indigenous people since the last ice ...

Obsidian is formed, in particular, by explosive volcanoes, not the tranquil types found in Hawaii ... Fortunately, the glass stone naturally breaks apart into large, knife-like shards, perfect ...