Snowflake obsidian is a form of volcanic glass that ... It appears as a dark glassy rock that’s typically black, although it can take on hues of green, brown, and other colors due to impurities.

Volcanic eruption buried ancient ... Italy's Mount Vesuvius erupted in 79 AD found dark fragments resembling obsidian inside ...

Obsidian is perhaps best known in its role as the dark black blade atop ancient spears ... including shades of green, purple, and blue. Colorful, sure, but we’d say it reminds us more of an ...

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 ...

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 ...

(CNN) — Glass rarely forms naturally from organic materials. However, in 2020, researchers discovered a black, glassy substance inside the skull of a person killed during the eruption of Italy ...