Obsidian

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Specimens[edit]

  • Counterclockwise from top: obsidian, pumice (lower left), and rhyolite (lower right)

  • Rainbow obsidian

  • Snowflake obsidian

  • Snowflake obsidian.

  • Pig carved in snowflake obsidian, 10 centimeters (4 in) long. The markings are spherulites.

  • from Lake County, Oregon

  • Obsidian arrowhead

  • A polished snowflake obsidian on a white background

  • A polished snowflake obsidian

  • Obsidian from Panum Crater, Mono Lake.

Formations[edit]

  • Obsidian talus at Obsidian Dome, California

  • Pile of obsidian on Newberry Obsidian flow, central Oregon

  • Glass Mountain, a large obsidian flow at Medicine Lake Volcano

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