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Post by deb193redux on May 30, 2010 21:36:56 GMT -5
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Post by johnjsgems on May 30, 2010 21:44:04 GMT -5
I guess it was bought not found so location unknown? It looks a little like a red rhyolite copy of the chrysanthemum porphyry.
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stoneviews
fully equipped rock polisher
Member since April 2009
Posts: 1,864
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Post by stoneviews on May 30, 2010 21:52:22 GMT -5
Maaan!! Thats some cool lookin stuff, I never heard of it before, Thanks for showin, Very Cool.
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Post by stonesthatrock on May 30, 2010 23:18:51 GMT -5
oh boy do i like that....... time to look around.
mary ann
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Post by Hard Rock Cafe on Jun 1, 2010 12:36:27 GMT -5
I don't normally go in for spheres, but I bet this would make a nice one!
Nice rock!
Chuck
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Post by deb193redux on Jun 1, 2010 13:43:46 GMT -5
If the cabs proove too soft to get a good shape/shine, I will seriously consider a sphere before I cut any more slabs. It does seem to get harder as I go in, so ...
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Post by sandsman1 on Jun 1, 2010 17:43:35 GMT -5
im pretty sure stoneageindustries has some of that i didnt go look but i seen it there before
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Rockpox
starting to shine!
Member since March 2010
Posts: 38
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Post by Rockpox on Jun 1, 2010 17:52:09 GMT -5
Nice material ! If I remember right this comes out of Mexico.
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Post by deb193redux on Jun 1, 2010 19:17:29 GMT -5
they have the Mexican spider jasper. I have a lot of this and it is possible this rock is just a rare and more colorful variant. I have seen the jasper sold as starburst too. It may have come in a lot of spider jasper that I got from rockman69 on ebay. I have a faint memory of handpicking this one when I visited his warehouse.
All of it cuts dirty and is softer, so I call it a rhyolite. I am not a geologist, so maybe it is a softer jasper.
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Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,466
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Post by Sabre52 on Jun 1, 2010 19:55:42 GMT -5
Yeah, I have some of the Mexican stuff somewhere and a Nevada variant too but neither are anywhere as colorful and nice as your example. The acicular crystal fans in yours are much finer and more well defined too. Beautiful specimen!.....Mel
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Post by deb193redux on Jun 1, 2010 23:00:19 GMT -5
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elementary
fully equipped rock polisher
Member since February 2006
Posts: 1,077
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Post by elementary on Dec 8, 2013 17:32:03 GMT -5
Bumping regarding fossil/non-fossil question in Fossil thread.
Besides - a cool looking stone.
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Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,466
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Post by Sabre52 on Dec 8, 2013 18:04:11 GMT -5
Yeah, here are Nevada and a Mexican variants. I've probably seen half a dozen or more types of starburst/spider rhyolite. I've also seen intergrades between orbicular rhyolite and the starburst type which show features of both ...Mel Texas type:
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carloscinco
fully equipped rock polisher
Member since July 2008
Posts: 1,639
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Post by carloscinco on Dec 8, 2013 21:05:34 GMT -5
Good looking stuff, first I've seen of it. Mel's stuff looks real neat also.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,179
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Post by jamesp on Dec 8, 2013 22:39:36 GMT -5
Beautiful stuff.
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Post by deb193redux on Dec 8, 2013 23:16:40 GMT -5
not fossil
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Fossilman
Cave Dweller
Member since January 2009
Posts: 20,687
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Post by Fossilman on Dec 9, 2013 0:33:42 GMT -5
Now thats totally awesome!
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Post by 1dave on Dec 9, 2013 11:22:04 GMT -5
Rhyolites and obsidians are high in silica, which at high temperatures form cristobalite needles = Snowflake Obsidian. This is the first I have seen in Rhyolite. With a little of the feldspar elements, spheroids are formed. If a fair amount is present, Chrysanthemum Stone is formed. Your material sure is attractive!
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