Had we gone to the moon it might matter, but since we didn't, there are no moon rocks available. If you get your own, you can keep them. Supposedly NASA owns all of the "moon rocks", but if I had one and they wanted it, I'd take them to court and make them prove that they actually went to the moon and that my rock was from their exclusive collection. They would lose of course because all of their lunar mission data has mysteriously disappeared. That's right, the most important event to happen to man since God spoke to Moses and they lost it. Unfortunately, that didn't happen either.