✅ SOLVED Fossilized Egg?

[macro4422]

Found this on an Island near vancouver. Its shell was almost complete (with cracks) when I found it, when I hit it with another rock some shell cracked off. Recently I ground it down and it has a greeny granite like inside. a bit bigger than a chicken egg. someone told me there is a volcanic process that can cause this, which would make sense, but its shape and shell are compelling.

 

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[old digger]

Welcome to TNET! I do not think that you item is a fossil egg. But it does look like a rock nodule that consists of chert or other mineralized substances.

 

[macro4422]

What would cause that crust?

 

[Paleopilot]

What would cause that crust?

The crust was caused by hot molten lava. It probably rolled out of the flow and solidified.