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Let's Rock => Identifications of Materials => Topic started by: rockherder on December 05, 2018, 10:22:13 PM

Title: Tiger Stripe Obsidian? Anybody know what this is and where it came from
Post by: rockherder on December 05, 2018, 10:22:13 PM

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.

Title: Re: Tiger Stripe Obsidian? Anybody know what this is and where it came from
Post by: rocks2dust on December 06, 2018, 10:35:55 AM

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.

Title: Re: Tiger Stripe Obsidian? Anybody know what this is and where it came from
Post by: ileney on December 06, 2018, 04:04:41 PM

Cool!

Title: Re: Tiger Stripe Obsidian? Anybody know what this is and where it came from
Post by: hummingbirdstones on December 06, 2018, 04:18:35 PM

I've never seen an obsidian that looks quite like that.  Very interesting and really pretty!