What Type of Rock is This?

[Oklahoma Digger]

Any ideas? Thanks!

 

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[StoneWhisper]

A simple river stone that sort of looks like its been fossilized or even char burned..Depending on where it was located.. I think it was used in a coal furnace because this stone retains heat for long periods of time thus the pitting.. as it burns.. the stone actually melts or is drawn into itself..

 

[Oklahoma Digger]

Thanks StoneWhisper!!!

 

[Eu_citzen]

From the pics nothing definitive can be said, perhaps a granitoid?