What is this rock

Johnnymiller

Tenderfoot
Nov 27, 2012
6
2
Primary Interest:
All Treasure Hunting

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Off hand it reminds me of a concretion but that does not seem right. A hardness test, streak test and acid test would help. It does not appear to be hand made so I'm guessing its a nodule of some mineral. Neat shape.
 

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