Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,487
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Post by Sabre52 on Nov 21, 2015 14:23:44 GMT -5
Howdy folks, Have more in the soap soak but here are the first couple for today. Thanks for looking.....Mel I thought this one was going to be a red banded agate but I'd call it more of a striped Rio. This is another of those Tiger tail/Cheetah Jasper relatives. The dendrites are very slivery metallic so I'd guess it's included psilomelane. For comparison, here is actual Mexican Tiger Tail Jasper, also a vein material.
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Deleted
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Member since January 1970
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Post by Deleted on Nov 21, 2015 18:50:51 GMT -5
Psilomelane or hematite/magnetite?
Those cheetah types are reall sweet mel.
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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 Nov 21, 2015 20:09:19 GMT -5
Yeah, Scott, you may be correct. Could be either of those other minerals instead of my guess. The hematite I'm used to in my Hornitos Jasper has a bit of a purplish black metallic sheen but magnetite is a very good bet...Mel
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Post by adam on Nov 22, 2015 8:33:32 GMT -5
Are Rio agates and jaspers found along the Rio Grande? I'm just confused. Wonderful cuts, though.
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Fossilman
Cave Dweller
Member since January 2009
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Post by Fossilman on Nov 22, 2015 9:37:52 GMT -5
Nice Rios Mel......I need to start slabbing a few of mine too...
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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 Nov 22, 2015 14:50:16 GMT -5
Adam, Rio Grande agate and jasper are found is what are called the Ulvalde gravels. These are ancient beds of gravels laid down several hundred feet thick by the ancient Rio grande River and it's tributaries. Band starts south of Uvalde Texas, where it was first described, to a huge area of south Texas all along the present day Rio Grande River to about the Falcon Dam region. Since the ancient rivers were huge and drained most all the agate regions of northern Mexico and west Texas, there are a huge number of agate and jasper varieties to be found in river tumbled cobble form.....Mel
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jamesp
Cave Dweller
Member since October 2012
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Post by jamesp on Nov 22, 2015 19:46:15 GMT -5
Got about 40 pounds rolling in the tumbler, many hand picked Rio oddballs. can't wait for Mel to ID them.
those are unique Mel. First one is blood.
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Post by Donnie's Rocky Treasures on Nov 24, 2015 6:45:29 GMT -5
Amazing how variable the Rios can be. I think the Rio tiger tail looking one is prettier than the Mexican tiger tail.
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