Creek walking today: some misc. jasper & chert

[Blackfoot58]

Looking for tumbling rough. Found misc jasper. Bottom row: agatized jasper. 2nd row, right: banded jasper.
Some are really small, but I keep them for the grandkids. They like them.
The black rock is around 7 Mohs. Waxy look, no visible crystals. I’m guessing black chert. If so, it’s the largest chunk I’ve found.

 

Amazon Forum Fav 👍

DR.ÖTEK Metal Detector, Waterproof Gold Detector, Pinpoint & Terrain Modes, Professional Metal Detector - Grab it through Amazon!

[ToddsPoint]

Your black rock is igneous, not flint. It looks like basalt to me. Put a billet on it and see if you can detach a flake. Betcha can’t!

 

[Blackfoot58]

Your black rock is igneous, not flint. It looks like basalt to me. Put a billet on it and see if you can detach a flake. Betcha can’t!

I’ll try that. Thanks

 

[Blackfoot58]

Your black rock is igneous, not flint. It looks like basalt to me. Put a billet on it and see if you can detach a flake. Betcha can’t!

It split with one billet strike. Perfectly flat cleavage. Definitely not flint/chert.