Snowflake obsidian is a form of volcanic glass that features white or grayish “snowflake” shapes made of embedded cristobalite. These pretty patterns are not artificially added as a cheap ...
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A young man’s brain turned to glass during the eruption of Mount Vesuvius. Scientists say they have figured out how“Obsidian glass, that is a volcanic glass ... At the bottom of the layers of ash and rubble that buried Herculaneum is a layer of fine volcanic ash that may have been deposited by the ash cloud, ...
Under the lamp, I suddenly saw small glassy remains glittering in the volcanic ash that filled the skull," Petrone said.
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.
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