🔎 UNIDENTIFIED Agates (?)

[Blackfoot58]

Picked up a few rocks on my morning hike. When I got home , these 2 caught my eye, mainly because I thought they were chert, in the field.
Both are translucent, especially around the edges. So I’m guessing chalcedony agates. The black one tapers off to gray. The brown one has sandstone or limestone affixed to one end. Probably not exciting to anyone else, but I really enjoy rocks.
Have a great day!

 

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[fuss]

The one on the left is Chert, I cant tell much from the photo of the one on the right (need a better photo) but might be a Quartz or Quartzite. No agates this time but depending on where you are in Iowa Lakers can be found.

 

[ToddsPoint]

I think you are near the area where Lake Superior agates can be found. I’m too far east for Lake Superior agate. Agate of any type is pretty scarce in our glacial till. I agree with Fuss. Good high quality chert on the left. Most chert with any yellow color will turn pink, orange or red when heated to 550F.

 

[Blackfoot58]

I think you are near the area where Lake Superior agates can be found. I’m too far east for Lake Superior agate. Agate of any type is pretty scarce in our glacial till. I agree with Fuss. Good high quality chert on the left. Most chert with any yellow color will turn pink, orange or red when heated to 550F.

Here’s how I got confused. This was from a rock site I use. Hopefully I’ll eventually get a grip on rock ID. Thanks for the help. 👍🏼

 

[fuss]

Try using these sites for help

https://geology.com/rocks/

https://www.mindat.org/min-51.html

and delete the other sites bookmark...forever..

 

[Blackfoot58]

I’ve got the saved as favorites. Thanks

 

[Clay Diggins]

It's all Chalcedony. The names Agate, Chert, Flint, Jasper etc are all Chalcedony. It's just a different form of very human color pareidolia. We like to classify things by the way they look. Green chalcedony is often called Chrysoprase while banded Chalcedony is called Agate. Both are the same mineral.