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Vugs, vacuoles and voids

Hi Steven, Bernd and List,

How can one determine (short of taking the sample to an expert), the
difference between lithophysae (Latin for rock bubbles)  which,  if I
understand correctly are from lava flows and have interior cavities with
spheres that formed presumably as the temperatures dropped to a critical
point, crystallized, the dissovled gases being driven out of the
solution,  and something like the Albion meteorite?

Further, if this sample has an iron fusion crust, what is the likelihood
that it is a meteorite?  Anyone with any help would be appreciated.

Best regards,
Julia