Lets just look at new artifacts. Of the 270 Apollo 11 Moon rocks and the Apollo 17 Goodwill Moon Rocks that were given to the nations of the world by the Nixon Administration, approximately 180 are unaccounted for. https://en.wikipedia.org/wiki/Stolen_and_missing_Moon_rocks#:~:text=Of%20the%20270%20Apollo%2011,away%20in%20storage%20for%20decades.