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Rock Identification (imgs.xkcd.com)

submitted 1 week ago by [email protected] to c/[email protected]

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'Is it worth anything?' 'I dunno, is the answer to that question worth another $5?'

https://xkcd.com/3068/

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[–] [email protected] 4 points 6 days ago* (last edited 6 days ago) (1 children)

Edit: I was wrong, see below! Shouldn't have assumed simulating active galactic nuclei would make me knowledgeable about asteroids.

Astrophysicist, not a geologist here. Maybe if you sent a pic I might recognize it. But it's kind of unlikely, since afaik crystals from under great pressures, which meteorites don't tend to undergo like that.

[–] [email protected] 4 points 6 days ago

Not only under pressure but under very slow cooling as what happens in the centers of asteroids

The rhomboid crystal structure of meteor iron was set long before that particular rock entered our atmosphere and is visible in many, MANY museum pieces.