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Post by tkrueger3 on Dec 20, 2010 18:55:18 GMT -5
This was one of the rocks Mary Ann - stonesthatrock - sent me. I cut it up today, and man, is it pretty stuff! Unfortunately, if you just look at it the wrong way, it just crumbles. No possiblity of getting cabs out of it, but maybe, if I can polish a slab without destroying it, it will make a great display specimen. I wish I knew what to call it besides "conglomeration" or "puddingstone". Thanks for looking, and for any info you can supply as to an ID. Tom
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NDK
Cave Dweller
Member since January 2009
Posts: 9,440
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Post by NDK on Dec 20, 2010 19:55:59 GMT -5
Cool rock Tom. Is that maybe mushroom jasper?
Nate
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chromenut
fully equipped rock polisher
Member since December 2009
Posts: 1,971
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Post by chromenut on Dec 20, 2010 19:56:52 GMT -5
If it were a jasper I don't think it would be that crumbly, would it?
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Post by frane on Dec 20, 2010 20:21:36 GMT -5
It is probably a rhyolite that is not silified enough. Sometimes you can just let it break up and use the little pieces to cab or tumble as they wish to be. Fran
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Post by tkrueger3 on Dec 23, 2010 17:37:17 GMT -5
I might do what Fran suggests - it seems like a lot of the parts that break off are centered around one or more of the "eyes" - if it'll polish without coming apart, might make a neat little cab.
Tom
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Post by johnjsgems on Dec 23, 2010 17:44:53 GMT -5
Tom, I would post it in the fossil area before you break it up. Looks a little like a cycad of some sort but I'm no expert.
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Sabre52
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Me and my gal, Rosie
Member since August 2005
Posts: 20,487
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Post by Sabre52 on Dec 23, 2010 18:09:53 GMT -5
Yeah, that appears to be mushroom jasper which is an orbicular rhyolite. Frequently the opalized sections ( the mushrooms) are joined by very porous rhyolite. The unsilicified areas can be poreous and crumbly. Not too unlike rainforest jasper from Australia or the so called Thunderegg Matrix from near Naches, WA. Both those material can have the green crumbly or porous areas also. Usually the orby areas themselves can be cabbed if large an contiguous enough....Mel
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Deleted
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Post by Deleted on Dec 23, 2010 18:14:42 GMT -5
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Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,487
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Post by Sabre52 on Dec 23, 2010 19:42:41 GMT -5
*L* Yep Shannon is right. Lily Pad *L* Must be the season but I got all mixed up.....Mel
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Deleted
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Post by Deleted on Dec 23, 2010 20:15:46 GMT -5
*L* Yep Shannon is right. Lily Pad *L* Must be the season but I got all mixed up.....Mel Too much eggnog Mel? LOL ;D Well heck, all those Rhyolites are just simply Rhyolite....with different fancy names. Shannon
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Post by tkrueger3 on Dec 23, 2010 23:19:11 GMT -5
Thanks for the explanations, guys! Whatever it is, it's durn purty, and I will be trying to cab some of it, for sure!
Tom
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Post by sandsman1 on Dec 24, 2010 1:18:37 GMT -5
you could prob lay it in a metal try and treat it with hardner -- cant remember the name of the stuff but it just might be what it needs
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Deleted
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Post by Deleted on Dec 24, 2010 19:26:07 GMT -5
Opticon....or even regular super glue to stabilize. Super glue smells yucky when you are cabbing it though.
Shannon
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spicer m
spending too much on rocks
Member since October 2008
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Post by spicer m on Dec 25, 2010 0:03:11 GMT -5
Could You stabalize it? 1 Tube of 20min epoxy mixed with in a pint of Acetone. Let slab soak in it 7 to 14 days. Stir ones a day. Take out and let it dry, then Cab. Mike
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spicer m
spending too much on rocks
Member since October 2008
Posts: 337
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Post by spicer m on Dec 25, 2010 0:04:02 GMT -5
Could You stabalize it? 1 Tube of 20min epoxy mixed with in a pint of Acetone. Let slab soak in it 7 to 14 days. Stir ones a day. Take out and let it dry, then Cab. Mike
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Post by stonesthatrock on Dec 25, 2010 1:11:48 GMT -5
the epoxy acetone, don't work. i tried it with a piece of azurite
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