Discovered this today in a load of landscaping rocks. Can anyone help identify?

[nrsearcher]

I found this today and it has no magnetism and leaves a faint mark on bare porcelain and definitely scratches glass. It is 2.5” L x 1.5” W and approximately .75” thick, weighs 76 grams.



I tried google image search but nothing similar comes up. It is very shiny.



Any ideas? It has my curiosity going.

Thanks for any suggestions.

 

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[dozer dan]

Was the small red rock lava rock cinders? If so, I’d have to agree with the slag theory. I think I’d still hang on to it though. Neat conversation piece.

 

[AU Seeker]

If you can find a jewelry store or pawn shop that has a XRF analyzer/spectrometer, they may test it for you to see what it is, they charge a small fee or do it for free.