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Author Topic: Unknown beachrock  (Read 2091 times)

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nwbeachrocker

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Unknown beachrock
« on: January 15, 2017, 05:28:04 PM »
I found this rock at a NW Washington beach.  I have slabbed it and cabbed it, but still can't figure out what it is. It might just be some funky granite, but I wondered if anyone else has seen anything like it.  I'm heading out now to set the cab in some silver and would like to be able to identify the piece when done.
It does not scratch with a knife.

Half the original rock
swirl rock.jpg
*swirl rock.jpg (92.48 kB . 480x640 - viewed 568 times)

One of the slabs
swirl slab.jpg
*swirl slab.jpg (115.24 kB . 480x640 - viewed 575 times)

The first cab
swirl cab.jpg
*swirl cab.jpg (87.02 kB . 480x640 - viewed 518 times)
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lithicbeads

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Re: Unknown beachrock
« Reply #1 on: January 15, 2017, 05:46:49 PM »
The flow structure makes it look like a meta-gneiss. In this case it was heavily silicified.
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