As with other forms of obsidian, rainbow obsidian is both rock and glass. However, this isn’t the same kind of glass that’s used in your nice new French doors. It’s far more badass ...

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

To assist us in understanding what dragonglass truly is in real life, the Natural History Museum of London has been sharing photos ... Obsidian is a black, naturally-occurring igneous rock formed ...

Black obsidian rock glistens in the sun along sections of the trails that take hikers along alpine meadows, rugged cliffs, and Cascade peaks that rise into the blue sky deep in the Three Sisters ...

An explosive volcanic eruption in Chile has given scientists the first direct insight into the strange motion of rocky lava known as obsidian flow. Rather than a red river of molten rock oozing ...