It has been noted that graphite also exhibits "one-dimensional diamagnetism" (in the sense that it has much stronger diamagnetism in one plane than the other tw

It has been noted that graphite also exhibits "one-dimensional diamagnetism" (in the sense that it has much stronger diamagnetism in one plane than the other two) and it levitates fine and isn't very mysterious. There also haven't been any reliable measurements of strong diamagnetism in LK-99. We have the video from the team, which is not evidence of diamagnetism let alone strong diamagnetism, and we have a handful of magnetic susceptibility tests from labs on tiny, tiny samples (much smaller than the one in the video) that found weak diamagnetism. I don't really think anything about LK-99 is optimistic at this point, honestly.