Hopewell Culture Obsidian (U.S. National Park Service)
AINW (Archaeological Investigations Northwest) on Twitter: "Hafted obsidian tools like these replicas (microblade [left] and flake [right]) were sharper than modern steel scalpels, allowing for precision cutting. #Archaeology #ExperimentalArchaeology ...
What is obsidian? Stone tools - Quatr.us Study Guides