DingusTheWise Posted July 27 Share Posted July 27 My grandad found this in central Montana years ago and never knew what it was. It holds very special value to me and I just want help in identifying what it actually is. Seems to be more than a really cool rock. Please help! 1 Link to post Share on other sites
Fin Lover Posted July 27 Share Posted July 27 Sorry, not a fossil. 1 Link to post Share on other sites
debivort Posted July 27 Share Posted July 27 I agree, this looks like a particularly robust and polished ironstone concretion. I wonder if it sat out on the surface and picked up a polish from abrasion of particles moving in the air. 1 Link to post Share on other sites
Fossildude19 Posted July 28 Share Posted July 28 Really cool chert nodule/concretion. 1 Link to post Share on other sites
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