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 ...

Scientists say they have worked out the sequence of events that likely killed the victim and led to the formation of the unique and puzzling glass ...

A man, thought to be the custodian of a religious group, was believed to be in his bed asleep, when a super-hot ash cloud hit ...

"Taking one of these fragments, it had a black appearance and shiny surfaces quite similar to obsidian, a natural glass of volcanic origin - black and shiny, whose formation is due to the very ...

Like other igneous rocks, the glossy glass originates from molten rock that has been spewed out from the bowels of the Earth via volcanoes. Before we get into the snowflakes, obsidian is formed ...

A man's brain was partly turned into glass after Mount Vesuvius erupted. Researchers discovered dark fragments resembling obsidian in the skull of a man in the ancient settlement of Herculaneum.