I found this in SE montana. It feels quite dense and is about 1.5". The lighter colored divets cover the entire thing and some have holes going deeper into the stone.

I was told it could possibly be a worn piece of fossilized coral but i am completely clueless. Appreciate any help you can throw my way!enter image description here


closed as off-topic by Gimelist, Peter Jansson, user12525, Fred, Erik Aug 27 at 6:43

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  • $\begingroup$ Was it in river sediments? In a moraine? $\endgroup$ – Spencer Nov 13 '16 at 21:21

I believe the rock is fossilized coralfossil coral, Alaska Here is similar piece from Alaska.


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