Image: Glass Buttes Obsidian, Lake County, Oregon (USFS)
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Description: Image of obsidian from Glass Buttes, Oregon; obsidian types clockwise from upper right are rainbow, jet black, pumpkin, mahogany, gold sheen, and double flow; the center piece is also gold sheen
Title: Glass Buttes Obsidian, Lake County, Oregon (USFS)
Credit: http://www.fs.usda.gov/detail/deschutes/recreation/rocks-minerals/?cid=stelprdb5381935
Author: United States Forest Service
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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