Board Thread:Theories/@comment-27441457-20151225042055/@comment-25322628-20160609070007

TheDoctorX wrote: Not really, it depends on what the crystal is. Salt is a crystal of the compound sodium chloride, for example. A diamond is a particular lattice of carbon atoms.

Again, we have to be careful speculating based on the science. Creating a diamond--synthetic diamond--would be impossible around Annie, of course. So it is probably "A Diamond, Jim, but Not as We Know it" which can somehow be synthesized around a person and somehow preserve her body and possibly keep it alive. . . and. . . stuff!

--J.D. Annie can probably do what Greed was capable of achieving in FMA: Rearrange the atoms of her body to create the diamond-like covering to increase her durability.