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Rocket6020

Is this anything other than a rock?

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Rocket6020

Gday all, was wondering if this was an egg or a rock? I found it on a beach in Australia near the border of south Australia and Victoria when I was a kid, I cut it in half and just forgot about it for around 20 years! 

 

 

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Tidgy's Dad

It's a very pretty thing. :)

i think it's been cut and polished into the egg shape and the markings inside are dendrites, a manganese mineral. 

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Rocket6020

Maybe? It would have been rolling around in the southern ocean for more than a little while I guess! 

 

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Fossildude19

I agree - polished stone. 

No fossil or egg likeness here. 

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Rocket6020

So given that it's a rock does anyone have any idea on the yellow/tan colour in the middle? 

 

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Fossildude19

Not egg yolk. 

Original color of the matrix. The darker stuff may have been super heated. 

Common for metamorphic rocks.  ;) 

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