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Help identifying this agate (?) slice
  
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jrh4




Joined: 27 Jun 2018
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PostPosted: Jun 27, 2018 17:40    Post subject: Help identifying this agate (?) slice  

Hi everyone! This is my first post, and I'm hoping the collective geniuses on this forum will be able to help me with some rock identifications. First off, I picked this up at a flea market and I'm assuming it's some kind of agate with bands of something else in there, Then there's a really neat crystal vug that's been covered in some kind of deposit. It's polished on one side and not on the other. I'll try to include as many pictures as possible (if I can figure it out), and I appreciate anyone who can help me identify it...cheers!


20180626_215149978_iOS.jpg
 Mineral: agate?
 Dimensions: 6 x 6 inches
 Description:
 Viewed:  844 Time(s)

20180626_215149978_iOS.jpg



20180627_053913990_iOS.jpg
 Mineral: agate?
 Description:
 Viewed:  848 Time(s)

20180627_053913990_iOS.jpg



20180627_053947487_iOS.jpg
 Mineral: agate?
 Description:
 Viewed:  844 Time(s)

20180627_053947487_iOS.jpg


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Bob Harman




Joined: 06 Nov 2015
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PostPosted: Jun 27, 2018 18:09    Post subject: Re: help identifying this really cool agate (?) slice  

Agates are very widespread with relatively few being highly distinctive for one locality.

Your very nice example, however, might be from Kentucky as the agates found there are relatively distinctive because their red color bands are in close proximity to the black color bands. An unusually distinctive appearance. Other agate experts might have additional localities to suggest. I suggest you google "Kentucky agates" and look thru their many photos of examples. In the small irregular cavity spaces there are small druzy quartz crystals

Welcome to this forum! BOB
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rocks2dust




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PostPosted: Jun 27, 2018 18:37    Post subject: Re: help identifying this really cool agate (?) slice  

My first thought was Coyamito agate from Chihuahua Mexico. Band colors, crystal pockets and "eye" formations all seem similar. Those were formed in andesite vesicles. I believe Kentucky agate is found in limestone, so you may be able to differentiate based on the matrix around the edges.
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jrh4




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PostPosted: Jun 27, 2018 18:51    Post subject: Re: help identifying this really cool agate (?) slice  

Thanks guys! I knew I came to the right place!

Those are both great observations and from the pics I saw it looks like it could be either of those (kentucky or coyamito). I attached another image here that shows the matrix around the edges, so to a trained eye does that help to narrow it down?

You'll also see there's an old cataloging on there so this piece must have been at auction or something a while back...



20180627_054056770_iOS.jpg
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jrh4




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PostPosted: Jun 27, 2018 18:54    Post subject: Re: help identifying this really cool agate (?) slice  

the matrix is actually more red around the edges than that picture shows, it's mostly white there
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