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Found in Peoria Arizona, please help identify. Not my normal find.
  
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Ashley Ratcliff




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PostPosted: Mar 22, 2021 20:04    Post subject: Found in Peoria Arizona, please help identify. Not my normal find.  

I found about 20 of these in one very specific spot off castle hot springs road. I've putzed around in the desert for years only found these in this spot. Any body have any experience with these? Please help identify what they are? How common are they? Again they are just littered off the highway in this one spot but havent found them anywhere else.
Thank you for the help.
Ashley



20210322_175810.jpg
 Mineral: Unknown
 Description:
Peoria, Arizona
1.5 cm
 Viewed:  915 Time(s)

20210322_175810.jpg


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Pete Richards
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PostPosted: Mar 22, 2021 20:39    Post subject: Re: Found in Peoria Arizona, please help identify. Not my normal find.  

Nice photograph! Is the object about 1/4"?

In order to help you further we need some information that you can provide. Will one of these objects fizz in warm vinegar? Will an edge of one scratch a knife, or will a knife scratch it?

Were these by, near, or part of a piece of rock or a ledge of bedrock? Can you find out anything about the local geology?

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Collecting and studying crystals with interesting habits, twinning, and epitaxy
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Ashley Ratcliff




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PostPosted: Mar 22, 2021 22:35    Post subject: Re: Found in Peoria Arizona, please help identify. Not my normal find.  

It's about 1/4 inch. (Its the smallest one yet most defined). It scratches the knife. However some parts are more fragile than other parts. It does not react to warm vinegar. They are loose on ground. Some of them have some quartz composition. In the same area I found abundant druzy geodes, and some of the best quality large chalcedony rosettes I've ever seen. The collection site was close to lake pleasant regional park which currently is a reservoir. Historically had active volcanic activity. Indian ruin, and was covered by ancient oceans long long ago (here say). It was found in the dirt. No obvious bedrock at site just dirt but was about a football field away from a rock cliff, they were found about midway up the mountain.


20210322_181222.jpg
 Mineral: Unknown
 Dimensions: 1.2x.6in
 Description:
 Viewed:  862 Time(s)

20210322_181222.jpg



20210322_181331.jpg
 Mineral: Unknown
 Dimensions: 1.5x1in
 Description:
 Viewed:  862 Time(s)

20210322_181331.jpg



20210322_181302.jpg
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 Viewed:  860 Time(s)

20210322_181302.jpg


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Ashley Ratcliff




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PostPosted: Mar 22, 2021 22:47    Post subject: Re: Found in Peoria Arizona, please help identify. Not my normal find.  

I forgot some geography:

Not sure if it matters but temp ranges from about 20 F to 120F. It is desert about 10 mi from the base of the Bradshaw mountains that jump from desert to forest rapidly.



Screenshot_20210322-204140_Chrome.jpg
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Volkmar Stingl




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PostPosted: Mar 23, 2021 00:30    Post subject: Re: Found in Peoria Arizona, please help identify. Not my normal find.  

These should be ironstone concretions in sedimentary rock.
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Ashley Ratcliff




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PostPosted: Mar 23, 2021 21:12    Post subject: Re: Found in Peoria Arizona, please help identify. Not my normal find.  

Thank you
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Poorboy




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PostPosted: Mar 23, 2021 22:10    Post subject: Re: Found in Peoria Arizona, please help identify. Not my normal find.  

Search for "agate skin" on the internet and scroll through the images. Your mention of chalcedony and geodes were the key clues for the association. Your pieces probably eroded from a vesicular andesite (intermediate extrusive igneous rock), somewhere in the pile of volcanic rocks in the vicinity of where you found these, as the skins weather relatively quickly.
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Poorboy




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PostPosted: Mar 23, 2021 22:18    Post subject: Re: Found in Peoria Arizona, please help identify. Not my normal find.  

Also try "agate husk" for comparable images; this worked better with Google
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