Any ideas?

[OregonGold76]

Looking for some ideas. Let me know what you all think.

Thanks.

 

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[OregonGold76]

Different piece of the same stone
And they do fit together

 

[Terry Soloman]

Meteorwrong, sorry.

 

[OregonGold76]

Meteorwrong, sorry.

Thank you Terry
Would you like to know what the most prominent element is in this stone?

 

[hvacker]

Without more defining qualities it's a black rock.
Simple tests can be done to narrow down the 3400 possibilities. A color streak test on a piece of rough porcelain, A hardness test from comparing the rock to known hard rocks. The kits can be just a few $$ for a small basic kit. There are also tests more involved like specific gravity, blow torch tests and others.
Some rocks are very definable with a picture but others not so much. The color of yours narrows a search down. A black rock might not have a black streak. Happy hunting..

 

[OregonGold76]

I had it tested in a scanning electron microscope at OSU a while back. The most abundant element in it is Magnesium. I’ll try to find the results of the testing and post them here too.

 

[galenrog]

You did not state where is was found, but western Oregon and many other parts of the western US have pockets of manganese ore. Some were rich enough to mine a century ago, but not today.

Time for more coffee.