This experiment started with a simple but risky question: could obsidian be worked like glass and shaped into a knife. Instead of cooperating, the material kept cracking, slumping, changing color, and ...

In this video, we explore the properties of obsidian by attempting to create a knife using a waterjet cutter. After previously cutting an obsidian rock into a cube, we now examine how well the ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. From card [referring to all 12 knives ...

X-ray technology has allowed researchers a glimpse at the reaches of the Yellowstone landmark’s prized stone and its importance to Indigenous people. By Jim Robbins YELLOWSTONE NATIONAL PARK, Wyo. — ...