This artifact was used to provide stone blades. Blade cores provided a portable source of stone or obsidian for manufacturing different kinds of tools by flaking off pieces from the core.

Indeed, obsidian tools and weapons have been found across the world from a variety of different cultures ... Rocks can possess all kinds of weird and freaky properties – radioactive decay ...

This artifact was used to provide stone blades. Blade cores provided a portable source of stone or obsidian for manufacturing different kinds of tools by flaking off pieces from the core.