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From Gizmag Emerging Technology Magazine:
When the moon-walking Apollo 11 astronauts returned to Earth in 1969, amongst the 47.5 pounds (21.5 kg) of lunar rocks they brought with them were three minerals from Tranquility Base that were thought to be unique to the Moon or lunar and possibly Martian meteorites. They were armalcolite (named after Neil Armstrong, Edwin 'Buzz' Aldrin and Michael Collins), pyroxferroite and tranquillityite. Both armalcolite and pyroxferrite were later found on Earth, leaving tranquillityite as the last mineral believed to have no terrestrial counterpart. Now tranquillityite has also been struck off the list with its discovery in the remote Pilbara region of Western Australia.
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