Like the other commentor said. It's usually a very weak effect, strong diamagnetism is uncommon. It's exciting to see replication of the material and it exhibit

Like the other commentor said. It's usually a very weak effect, strong diamagnetism is uncommon. It's exciting to see replication of the material and it exhibiting properties we'd expect to see, as it lends credibility to the original claim. Right now the original claim is on shakey ground because one of the authors rushed the publication, so there's problems with the original paper that needed addressing (I havent looked at the new paper yet). So there's a bit of parallel construction going on, the authors are fixing the publication while other researchers are working to replicate the material/claims. So basically, people are super excited because so far, the material has been replicated to some degree of success a few times, and exhibiting properties that support the original claim. The claim of room temperature super conductors is exciting by itself, but that the science is replicating to any degree in such a short window is awesome