✅ SOLVED Unidentified Deposits in Sandstone That Look Like Iron

[Digstuff]

Hello all,
I work for a local quarry, and I often find deposits in the PA sandstone that look like this.
My boss wants me to figure out what it is.
It is not magnetic.
I also might add, it is very heavy compared to normal sandstone.
Thanks!

 

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[Clay Diggins]

It is a form of iron. It's an Iron Pyrite nodule.
Pyrite is iron combined with sulfur. FeS2 It's not magnetic.

 

[Clay Diggins]

Here are some more pictures of Pyrite collected in your region.

 

[smokeythecat]

It LOOKS like pyrite. What part of PA? Near Allentown there are uranium deposits (scattered.)

 

[Digstuff]

Ok, that's what it has to be.
It doesn't seem quite as flaky or shiny as most pictures, but it does seem to match a few.
I am near Bloomsburg, about 65 miles from Allentown. Too bad it's not uranium... that would be cool!
Thanks for your help guys!