which has been created through a partial crystallization of the glass. Since it's born out of molten rock, obsidian is only found in volcanic regions of the world, including in parts of the United ...

As with other forms of obsidian, rainbow obsidian is both rock and glass. However ... which has a long history of volcanic activity. There are four mines in this region that, with a permit ...

Under the lamp, I suddenly saw small glassy remains glittering in the volcanic ash that filled the skull," Petrone said.

Scientists found glass fragments inside the skull of a young man who died in Herculaneum when Mt. Vesuvius exploded in 79 CE.

A young man's brain turned into glass during Mount Vesuvius’ 79 AD eruption. Scientists now study how extreme heat preserved ...

They look like small pieces of obsidian, smooth and shiny ... are thought to be pieces of his brain—turned to glass. The discovery, reported in 2020, was exciting because a human brain had ...

Along with volcanic ash, his brain and spinal cord ... The shards, or clasts, have a glassy luster, making them look a lot like obsidian, a glass formed from lava when it cools very quickly.

“Obsidian glass, that is a volcanic glass, forms when lava is very quickly cooled, for example, where it enters into water,” Giordano added. However, the pyroclastic flows, composed of fast ...