Lapidaryforum.net
Let's Rock => Identifications of Materials => Topic started by: rockherder on December 05, 2018, 10:22:13 PM
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Anybody know what this is?
A friend of mine picked it up at a yard sale in Corvallis Oregon.
I've never seen obsidian like this anywhere else.
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Interesting mix of the mahogany and pumpkin colors. No way to be positive about the source from appearance in a photo, however. Could be from an open area such as Glass Buttes or Davis Creek, or from now closed deposits such as Obsidian Ridge, etc. OSU in Corvallis does have a program documenting the chemical signatures of obsidian from around the west.
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Cool!
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I've never seen an obsidian that looks quite like that. Very interesting and really pretty!