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Obsidian Obsidian Obsidian Obsidian Obsidian
Example of spherultitic obsidian.
A lump of black obsidian
Obsidian
Snowflake Obisidian
Obsidian Rough
Obsidian Obsidian Obsidian Obsidian
Obsidian
Snow-flake Obsidian (B)
Obsidian is an extrusive igneous rock that forms as lava and c...
Obsidian from Iceland
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Extrusive

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