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ID for Egg shaped item?


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Hi all, this comes from south america, a friend claims this is an egg but I am not so sure about it.

What do you think? 

Thanks a lot!!!








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Not an egg. 

Looks like agate or chert, to me. 

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Agreed. (Yay there's a thumb for that now)The would be shell, appears to me a much thicker and more durable material than would be expected to be seen on an egg this size.

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Mineral, unfortunately. Fossil eggs are incredibly rare.

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Fun specimen to add to the pseudofossil file.


I have a similar sized hunk of granite I use to mess with undergrads all the time.


<places chicken egg and granite cobble on bench>
”which is a dinosaur egg?”


they always pick the granite.

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