Yet another rock with a hole, but interesting

mcmich

Sr. Member
Mar 2, 2008
403
185
Michigan
Detector(s) used
Whites MXT, Minelab Equinox 800, Tesoro Tiger Shark

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ToddsPoint

Gold Member
Mar 2, 2018
5,517
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Todds Point, IL
Primary Interest:
Metal Detecting
It's not possible to drill a piece of chert unless you are using a tube drill and abrasive powder. I say natural. Some softer material eroded away leaving the holes. Gary
 

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mcmich

mcmich

Sr. Member
Mar 2, 2008
403
185
Michigan
Detector(s) used
Whites MXT, Minelab Equinox 800, Tesoro Tiger Shark
About an inch
 

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