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Learn More About Oregon's Geology
Gems and Minerals in Oregon
This volcanic glass can be collected in central Oregon at Glass Butte (a rockhounding site on BLM land) on Highway 20 between Bend and Burns. An enormous flow of obsidian can also be seen at Newberry Crater, south and east of Bend, but no collecting is permitted in this national monument.
Central Oregon Rockhounding Map (BLM)
obsidian The edge of obsidian can be flaked to one molecule in thickness, much sharper than any knife or razor edge.