If I were them, I would keep producing more samples before deciding to break some of them to get full levitation confirmation.
I think it would be more interesting to separate out the magnetically interesting material like this and attempt to analyze it to find out what it is.
if you want to see some interesting things and like a good chemistry video I thoroughly recommend searching for dry powder on powder chemical reactions… most of them are fire related demonstrations but it can be interesting to see them gently spoon a powder on top on another powder and nothing happens, until they poke it with a stirring rod hard enough to press the powder firmly against the other powder and get the reaction surface area to increase and then it’s off to the races… physical contacts between materials can sometimes not be in as much contact as you think… even when it’s literally pilled on top of the other stuff.
I'm a layman is material science. My understanding is it's possible these properties only exists on a very specific crystalline structure. Grinding/breaking these samples could cause the failure of the entire structure.
But for example when refining YBCO (another famous superconductor - but one that requires liquid nitrogen cooling to demonstrate its properties), you can take YBCO and grind/blend it up into a powder and press the powder into whatever shape you want with a die cast and then re-bake the new piece.