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Found this rock. Any ideas?
  
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Jdoverice




Joined: 08 Mar 2020
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Location: Wyoming

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PostPosted: Mar 08, 2020 16:41    Post subject: Found this rock. Any ideas?  

Found this on the Wyoming Plains. It was just sitting in the middle of nowhere with no other rocks around. It is smooth.


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Bob Harman




Joined: 06 Nov 2015
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PostPosted: Mar 08, 2020 17:14    Post subject: Re: Found this rock. Any ideas?  

Maybe a pleasingly iron-stained and water worn cobble of microcrystalline quartz.....chalcedony. Although no growth rings are apparent, even a broken and water worn piece of petrified wood is possible.
The conchoidal fracture in the upper left is noted, but identification just from the photo is difficult. BOB
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