Obsidian is a volcanic glass used to make tools for Stone-Age man – and for modern surgeons.

The stone at Obsidian Cliff has few inclusions, which means it lacks the presence of mineral crystals that can weaken the stone’s structure, and that contributes to the high quality of the ...

Obsidian is an energy stone admired and used for its protective properties and metaphysical benefits. Obsidian is used to protect its wearer. How Obsidian is formed is symbolic of its metaphysical ...

Researchers uncovered nearly 600 stone tools, almost exclusively made of obsidian, in one section of the cliff side. The artifacts were over 1.2 million years old, the study said.

Excavation uncovers evidence of 4 ancient human species, obsidian tools dating back over 300,000 years - Anadolu Ajansı ...

They found a fifteenth obsidian biface and several more stone tools on the site. Some of David's math students came to watch the excavation. Pouley shared what he had learned so far with the kids.

Obsidian is a volcanic glass used to make tools for Stone-Age man – and for modern surgeons.