OBSIDIAN

Obsidian

Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock.

The above text is a snippet from Wikipedia: Obsidian
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obsidian

Noun

  1. a type of black glass produced by volcanos

Adjective

  1. black


The above text is a snippet from Wiktionary: obsidian
and as such is available under the Creative Commons Attribution/Share-Alike License.

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