🔎 UNIDENTIFIED Conglomerate appearance

[Blackfoot58]

These rocks always catch my eye, when creek walking. I was once told they were “cobbles”. After much diligence, I don’t see anything that helps with ID either way.
Description (my terms used):
Shiny and waxy in appearance
Layered and swirled
No visible crystals
The small piece appears to have an outer edge that displays a “crust”
They appear to be fairly hard. I cannot scratch them with an iron nail.

Any insight appreciated. 🙏🏼

 

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[ConceptualizedNetherlandr]

Looks like sedimentary and metamorphosed/replace quartz of the cherty/flinty type.

 

[ToddsPoint]

Did you try knapping off some flakes? It looks a lot like flint to me.

 

[Blackfoot58]

Did you try knapping off some flakes? It looks a lot like flint to me.

I will try it. I didn’t think of flint. I’m not used to seeing it with such multi-colored swirls.