User blog comment:CorbeauKarasu/User Theory Discussion/@comment-1318060-20100810193121/@comment-178.203.130.33-20150723090922

Maybe were trying to get off the wrong poin Lets see what info we have; you need a five point transmutation circle and multiple human sacrifices to fabricate a philosophers stone, and judgeing by the fact that Marco said that the stone he has is incomplete, it may lack some kind of stabilisator that father uses, now if we take the homonculi for example,  you are right that envy's philosopher's stone is fluid inside,  but we see him putting pressure onto it before dying,  which means that it may have an outer she'll like a jelly bean filled with liquid. As lust died it couldve been that the stone was 'dried out' and the shell crumbled just like she did. In the flashback of Marcoh we see that the stone swirled in the air as liquid before forming, which implies that souls that are turned into a philosophers stone might condense like steam on a mirror,I just assumed that if we see it in a scientific light,  souls are in a gas like state,  get turned into liquid and may be stabilize into a solid form.