Lunar meteorites are among the most popular and sought-after meteorites, the total weight of lunar meteorites ever found is incredibly low compared to usual meteorites. NWA 4881 was found in the Sahara desert and classified as a feldspathic granulitic breccia, similar samples of which had been recovered at most Apollo lunar highland sites.
How do we know it is a real piece of the Moon?
The moon is constantly hit by meteorites itself and with no atmosphere and little gravity the larger impacts will eject lunar rocks into space. After this impact, this meteorite will eventually be brought down to Earth by the Earth's gravitational pull.
Scientists and universities all around the world are examining meteorites and compare them with known lunar material, e.g. samples collected during the Apollo missions. The composition of gases and isotopes found is so unique that they can say for sure the material originated from the moon.
A simple way is to check the NASA Jet Propulsion Laboratory website (www.jpl.nasa.gov) for details of the rock in question (Tissint Shergottite). All documented impacts will be listed there, where you can find details of your Mars Rock.
The moonrock comes in a plastic box and is about 5 mm in diameter which is fairly large. The box is 2x1 inch in size and can be opened, of course, to touch your piece of the moon!
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