Hey Jason, you're forgetting something... ;) Time.........................................4.56 billion years worth of it.
The easily available rocks we don't collect didn't really "originate" here... All rocks on Earth, or more correctly, that *formed* Earth, were once meteoroids/asteroids at some point in the last 4.56+ billion years. The rocks from space we do collect are only interesting only because they've not yet been terrestrialized.
Technically, there isn't a single grain of dust or sand on this planet that didn't originate in space if you go far enough back in time.
Hell... Earth itself is one big rock in space. ;) Regards, Eric On 3/7/2011 9:24 PM, Jason Utas wrote:
It means that for some irrational reason, we have all decided that it is a worthwhile endeavor to spend our hard-earned money on chunks of rock that happen to be a little different than the more easily available ones that have originated on earth.
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