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Obsidian: Mineral information, data and localities.
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Obsidian Igneous Rock Specimen
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Obsidian: Volcanic Glass
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Learning Geology: Obsidian
Obsidian
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Obsidian: Mineral information, data and localities.
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Obsidian
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Obsidian - Obsidian - Volcanic rock - Igneous or Magmatic rock - Rocks and Petrology - Photos
Obsidian: a naturally occurring volcanic glass formed as an extrusive igneous rock, from Vesuvius volcano, isolated on a white background, Naples, Italy Stock Photo | Adobe Stock
Obsidian: Igneous Rock - Pictures, Uses, Properties
Igneous Rocks
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Physical Geology: Igneous Rocks – Kurt Hollocher
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