The unknown

Wascocup

Greenie
Sep 8, 2023
11
11

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Ambergris?
 

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The first pictures look like a vein of quartzite from rock. The second pictures look like heat-melted slag, perhaps from metal smelting.
 

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I think it is a Native American sharpening stone. It could be fossilized, but I agree probably quartz.
 

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