What is this?

[P Carter]

I’m late, but here’s my photo of the bubble agate/chalcedony I have. It ain’t tree sap.

 

[Bdjones]

I'm no rock hound, but I believe the rock above is melted Scotia. Did you find it near some orange rock that looks and sounds like broken pottery. I believe those are melted by coal seam fires.

Bingo! Thanks for the info on this. You dont know how long I wondered what this was. I was hoping for something cool lol.

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[Legend]

I can't tell you what that stuff is but I also picked up a piece...looks identical.

 

[Hoghead]

Looks like a clinker. that's what you get when a power line hits the ground hot and melts everything together. I would imagine that a lightning strike would do the same.

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[AZmark]

Definitely agate....rock.

 

[Bullets&Bikes]

Eastern MT has some wierd rock forms..I found this too. I looked all over the web and couldn't identify it.

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This might be a fulgurite. Made from lightning hitting sandy soil. Melts the silica into weird shapes with a porous inside. I've found quite a few pieces in western ND.