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Arizona rock help
  
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J. Axel




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PostPosted: Jun 01, 2017 05:06    Post subject: Arizona rock help  

Hello all,
I found this strange rock in Arizona in the first badlands I encountered, most of the way to Marble Canyon, coming from Phoenix, Arizona. It's so pale blue, with no hint of green, I did not think it could be turquoise. It is quite hard, as are the strange, quartz-appearing semi-transparent veins of brown inclusions. It's about the size of a small cantaloupe in total. Never seen anything like it. I did find some very nice petrified wood in Marble Canyon proper.

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J. Axel



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J. Axel




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PostPosted: Jun 03, 2017 07:57    Post subject: Re: Arizona rock help  

Having looked more and more, I believe this is a very pale piece of turquoise. Please chime in if you agree or disagree. I don't know what else it could be.
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Bob Harman




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PostPosted: Jun 03, 2017 12:32    Post subject: Re: Arizona rock help  

I doubt it! There are several turquoise look-a-likes that are far more common.
I suggest taking the specimen to your local club and having members look at it in person. As another option, I suggest taking it to your local university and showing it to some geology faculty/students. Same thing for the geology section of a local museum.

Turquoise, casually found today is quite rare. Much of what is found/used is from Native American lands and from recognized localities. Most of "turquoise" used in jewelry today is not real, but a look-a-like or powdered and dyed and stabilized low end stuff. BOB
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J. Axel




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PostPosted: Jun 03, 2017 12:54    Post subject: Re: Arizona rock help  

Thanks Bob!

Yes, my exact thoughts were to take it to UNC Chapel Hill Geology Department and ask for an opinion from them. I've just looked at this again, and the rock tends to be grayish in color as well. Such a strange formation the way the veins of clears brown globule-like harder mineral are interspersed. Thanks for your help!

Bob Harman wrote:
I doubt it! There are several turquoise look-a-likes that are far more common.
I suggest taking the specimen to your local club and having members look at it in person. As another option, I suggest taking it to your local university and showing it to some geology faculty/students. Same thing for the geology section of a local museum.

Turquoise, casually found today is quite rare. Much of what is found/used is from Native American lands and from recognized localities. Most of "turquoise" used in jewelry today is not real, but a look-a-like or powdered and dyed and stabilized low end stuff. BOB
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Volkmar Stingl




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PostPosted: Jun 03, 2017 22:38    Post subject: Re: Arizona rock help  

Mudstone with calcite in joints, I think. Mudstone can have a variety of colours.
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J. Axel




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PostPosted: Jun 04, 2017 04:59    Post subject: Re: Arizona rock help  

Thanks!
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Joseph McAnney




Joined: 29 May 2017
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PostPosted: Jun 04, 2017 17:19    Post subject: Re: Arizona rock help  

Looks like Magnesite with Chalcedony, similar to material found near Burro Creek, Arizona.
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kushmeja




Joined: 28 Jul 2014
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PostPosted: Jun 04, 2017 17:46    Post subject: Re: Arizona rock help  

Volkmar Stingl wrote:
Mudstone with calcite in joints, I think. Mudstone can have a variety of colours.


I was thinking this, or something similar. It definitely has the appearance of mud that contracted and was filled in with a secondary mineral
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J. Axel




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PostPosted: Jun 04, 2017 18:09    Post subject: Re: Arizona rock help  

Thanks for all your insight. This was driving me kinda bananas!

Axel


kushmeja wrote:
Volkmar Stingl wrote:
Mudstone with calcite in joints, I think. Mudstone can have a variety of colours.


I was thinking this, or something similar. It definitely has the appearance of mud that contracted and was filled in with a secondary mineral
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