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Obsidian.

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15y ago

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A black glass-like rock could be obsidian, which is a natural volcanic glass formed from rapidly cooled lava. Obsidian is usually black in color and has a shiny, glassy appearance due to its lack of crystalline structure. It is commonly used in jewelry and decorative objects.


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It is commonly called "volcanic glass".


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What is a smooth glassy black igneous rock?

The rock you are describing is likely obsidian. Obsidian is a naturally occurring volcanic glass formed during rapid cooling of lava. It is usually black in color and has a smooth, glassy texture.


What is the obsidian rock type?

Obsidian is an extrusive felsic igneous rock.


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The name for black glass is obsidian. It is a naturally occurring volcanic glass formed from lava that cools rapidly. Obsidian is typically black in color, but may also have hints of other colors like brown, gray, or green.